diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppClientsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppClientsController.cs
index 17070ecf8..24ec24e27 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppClientsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppClientsController.cs
@@ -33,7 +33,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// </summary>
         /// <param name="app">The name of the app.</param>
         /// <returns>
-        /// 200 => Client keys returned.
+        /// 200 => Clients returned.
         /// 404 => App not found.
         /// </returns>
         /// <remarks>
@@ -62,7 +62,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="request">Client object that needs to be added to the app.</param>
         /// <returns>
-        /// 201 => Client generated.
+        /// 201 => Client created.
         /// 400 => Client request not valid.
         /// 404 => App not found.
         /// </returns>
@@ -118,7 +118,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="id">The id of the client that must be deleted.</param>
         /// <returns>
-        /// 200 => Client revoked.
+        /// 200 => Client deleted.
         /// 404 => Client or app not found.
         /// </returns>
         /// <remarks>
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppContributorsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppContributorsController.cs
index 1672a30a9..4e5ad1c62 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppContributorsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppContributorsController.cs
@@ -45,7 +45,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// </summary>
         /// <param name="app">The name of the app.</param>
         /// <returns>
-        /// 200 => App contributors returned.
+        /// 200 => Contributors returned.
         /// 404 => App not found.
         /// </returns>
         [HttpGet]
@@ -71,8 +71,8 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="request">Contributor object that needs to be added to the app.</param>
         /// <returns>
-        /// 201 => User assigned to app.
-        /// 400 => User is not found.
+        /// 201 => Contributor assigned to app.
+        /// 400 => Contributor request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
@@ -94,7 +94,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// </summary>
         /// <param name="app">The name of the app.</param>
         /// <returns>
-        /// 200 => User removed from app.
+        /// 200 => Contributor removed.
         /// 404 => Contributor or app not found.
         /// </returns>
         [HttpDelete]
@@ -117,7 +117,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="id">The id of the contributor.</param>
         /// <returns>
-        /// 200 => User removed from app.
+        /// 200 => Contributor removed.
         /// 404 => Contributor or app not found.
         /// </returns>
         [HttpDelete]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppLanguagesController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppLanguagesController.cs
index 982473b98..8f07b66bf 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppLanguagesController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppLanguagesController.cs
@@ -35,7 +35,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// </summary>
         /// <param name="app">The name of the app.</param>
         /// <returns>
-        /// 200 => Language configuration returned.
+        /// 200 => Languages returned.
         /// 404 => App not found.
         /// </returns>
         [HttpGet]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppPatternsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppPatternsController.cs
index 63e445b9a..3f0f76f95 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppPatternsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppPatternsController.cs
@@ -63,7 +63,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="request">Pattern to be added to the app.</param>
         /// <returns>
-        /// 201 => Pattern generated.
+        /// 201 => Pattern created.
         /// 400 => Pattern request not valid.
         /// 404 => App not found.
         /// </returns>
@@ -112,7 +112,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="id">The id of the pattern to be deleted.</param>
         /// <returns>
-        /// 200 => Pattern removed.
+        /// 200 => Pattern deleted.
         /// 404 => Pattern or app not found.
         /// </returns>
         /// <remarks>
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppRolesController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppRolesController.cs
index 53292cf69..b8d018d09 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppRolesController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppRolesController.cs
@@ -37,7 +37,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// </summary>
         /// <param name="app">The name of the app.</param>
         /// <returns>
-        /// 200 => App roles returned.
+        /// 200 => Roles returned.
         /// 404 => App not found.
         /// </returns>
         [HttpGet]
@@ -88,8 +88,8 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="request">Role object that needs to be added to the app.</param>
         /// <returns>
-        /// 201 => User assigned to app.
-        /// 400 => Role name already in use.
+        /// 201 => Role created.
+        /// 400 => Role request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
@@ -138,7 +138,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="roleName">The name of the role.</param>
         /// <returns>
         /// 200 => Role deleted.
-        /// 400 => Role is in use by contributor or client or default role.
+        /// 400 => Role is in use by contributor or client or a default role.
         /// 404 => Role or app not found.
         /// </returns>
         [HttpDelete]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppWorkflowsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppWorkflowsController.cs
index 8848a8029..8645038e2 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppWorkflowsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppWorkflowsController.cs
@@ -38,7 +38,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// </summary>
         /// <param name="app">The name of the app.</param>
         /// <returns>
-        /// 200 => App workflows returned.
+        /// 200 => Workflows returned.
         /// 404 => App not found.
         /// </returns>
         [HttpGet]
@@ -64,8 +64,8 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="app">The name of the app.</param>
         /// <param name="request">The new workflow.</param>
         /// <returns>
-        /// 200 => Workflow updated.
-        /// 400 => Workflow request is not valid.
+        /// 200 => Workflow created.
+        /// 400 => Workflow request not valid.
         /// 404 => Workflow or app not found.
         /// </returns>
         [HttpPost]
@@ -90,7 +90,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="id">The id of the workflow to update.</param>
         /// <returns>
         /// 200 => Workflow updated.
-        /// 400 => Workflow request is not valid.
+        /// 400 => Workflow request not valid.
         /// 404 => Workflow or app not found.
         /// </returns>
         [HttpPut]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppsController.cs
index f54fcd01e..dbf193ddc 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Apps/AppsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Apps/AppsController.cs
@@ -151,6 +151,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="request">The values to update.</param>
         /// <returns>
         /// 200 => App updated.
+        /// 400 => App request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPut]
@@ -172,6 +173,7 @@ namespace Squidex.Areas.Api.Controllers.Apps
         /// <param name="file">The file to upload.</param>
         /// <returns>
         /// 200 => App image uploaded.
+        /// 400 => App request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetFoldersController.cs b/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetFoldersController.cs
index af67c6c7e..c59190e78 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetFoldersController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetFoldersController.cs
@@ -75,6 +75,7 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="request">The asset folder object that needs to be added to the App.</param>
         /// <returns>
         /// 201 => Asset folder created.
+        /// 400 => Asset folder request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
@@ -100,8 +101,8 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="request">The asset folder object that needs to updated.</param>
         /// <returns>
         /// 200 => Asset folder updated.
-        /// 400 => Asset folder name not valid.
-        /// 404 => Asset or app not found.
+        /// 400 => Asset folder request not valid.
+        /// 404 => Asset folder or app not found.
         /// </returns>
         [HttpPut]
         [Route("apps/{app}/assets/folders/{id}/", Order = -1)]
@@ -126,7 +127,8 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="request">The asset folder object that needs to updated.</param>
         /// <returns>
         /// 200 => Asset folder moved.
-        /// 404 => Asset or app not found.
+        /// 400 => Asset folder request not valid.
+        /// 404 => Asset folder or app not found.
         /// </returns>
         [HttpPut]
         [Route("apps/{app}/assets/folders/{id}/parent", Order = -1)]
@@ -150,7 +152,7 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="id">The id of the asset folder to delete.</param>
         /// <returns>
         /// 204 => Asset folder deleted.
-        /// 404 => Asset or app not found.
+        /// 404 => Asset folder or app not found.
         /// </returns>
         [HttpDelete]
         [Route("apps/{app}/assets/folders/{id}/", Order = -1)]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetsController.cs
index b2cd8b3c3..1450b69bd 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Assets/AssetsController.cs
@@ -177,9 +177,9 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="duplicate">True to duplicate the asset, event if the file has been uploaded.</param>
         /// <returns>
         /// 201 => Asset created.
-        /// 404 => App not found.
-        /// 413 => Asset exceeds the maximum upload size.
         /// 400 => Asset request not valid.
+        /// 413 => Asset exceeds the maximum upload size.
+        /// 404 => App not found.
         /// </returns>
         /// <remarks>
         /// You can only upload one file at a time. The mime type of the file is not calculated by Squidex and is required correctly.
@@ -214,9 +214,9 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="file">The file to upload.</param>
         /// <returns>
         /// 200 => Asset updated.
-        /// 404 => Asset or app not found.
-        /// 413 => Asset exceeds the maximum upload size.
         /// 400 => Asset request not valid.
+        /// 413 => Asset exceeds the maximum upload size.
+        /// 404 => Asset or app not found.
         /// </returns>
         /// <remarks>
         /// Use multipart request to upload an asset.
@@ -245,7 +245,7 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="request">The asset object that needs to updated.</param>
         /// <returns>
         /// 200 => Asset updated.
-        /// 400 => Asset name not valid.
+        /// 400 => Asset request not valid.
         /// 404 => Asset or app not found.
         /// </returns>
         [HttpPut]
@@ -271,6 +271,7 @@ namespace Squidex.Areas.Api.Controllers.Assets
         /// <param name="request">The asset object that needs to updated.</param>
         /// <returns>
         /// 200 => Asset moved.
+        /// 400 => Asset request not valid.
         /// 404 => Asset or app not found.
         /// </returns>
         [HttpPut]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Backups/BackupsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Backups/BackupsController.cs
index 7a9e89baf..10941e581 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Backups/BackupsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Backups/BackupsController.cs
@@ -61,6 +61,7 @@ namespace Squidex.Areas.Api.Controllers.Backups
         /// <param name="app">The name of the app.</param>
         /// <returns>
         /// 204 => Backup started.
+        /// 400 => Backup contingent reached.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
@@ -81,7 +82,7 @@ namespace Squidex.Areas.Api.Controllers.Backups
         /// <param name="app">The name of the app.</param>
         /// <param name="id">The id of the backup to delete.</param>
         /// <returns>
-        /// 204 => Backup started.
+        /// 204 => Backup deleted.
         /// 404 => Backup or app not found.
         /// </returns>
         [HttpDelete]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Comments/CommentsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Comments/CommentsController.cs
index 3ad296038..0c1945ab2 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Comments/CommentsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Comments/CommentsController.cs
@@ -42,7 +42,7 @@ namespace Squidex.Areas.Api.Controllers.Comments
         /// When passing in a version you can retrieve all updates since then.
         /// </remarks>
         /// <returns>
-        /// 200 => All comments returned.
+        /// 200 => Comments returned.
         /// 404 => App not found.
         /// </returns>
         [HttpGet]
@@ -72,7 +72,7 @@ namespace Squidex.Areas.Api.Controllers.Comments
         /// <param name="request">The comment object that needs to created.</param>
         /// <returns>
         /// 201 => Comment created.
-        /// 400 => Comment is not valid.
+        /// 400 => Comment request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
@@ -100,7 +100,7 @@ namespace Squidex.Areas.Api.Controllers.Comments
         /// <param name="request">The comment object that needs to updated.</param>
         /// <returns>
         /// 204 => Comment updated.
-        /// 400 => Comment text not valid.
+        /// 400 => Comment request not valid.
         /// 404 => Comment or app not found.
         /// </returns>
         [HttpPut]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Contents/ContentsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Contents/ContentsController.cs
index 1c8e7c8f3..f3362ca3f 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Contents/ContentsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Contents/ContentsController.cs
@@ -45,8 +45,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="app">The name of the app.</param>
         /// <param name="queries">The graphql query.</param>
         /// <returns>
-        /// 200 => Contents retrieved or mutated.
-        /// 404 => Schema or app not found.
+        /// 200 => Contents returned or mutated.
+        /// 404 => App not found.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -77,8 +77,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="app">The name of the app.</param>
         /// <param name="query">The graphql query.</param>
         /// <returns>
-        /// 200 => Contents retrieved or mutated.
-        /// 404 => Schema or app not found.
+        /// 200 => Contents returned or mutated.
+        /// 404 => App not found.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -109,8 +109,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="app">The name of the app.</param>
         /// <param name="batch">The graphql queries.</param>
         /// <returns>
-        /// 200 => Contents retrieved or mutated.
-        /// 404 => Schema or app not found.
+        /// 200 => Contents returned or mutated.
+        /// 404 => App not found.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -141,7 +141,7 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="app">The name of the app.</param>
         /// <param name="ids">The optional ids of the content to fetch.</param>
         /// <returns>
-        /// 200 => Contents retrieved.
+        /// 200 => Contents returned.
         /// 404 => App not found.
         /// </returns>
         /// <remarks>
@@ -170,7 +170,7 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="app">The name of the app.</param>
         /// <param name="query">The required query object.</param>
         /// <returns>
-        /// 200 => Contents retrieved.
+        /// 200 => Contents returned.
         /// 404 => App not found.
         /// </returns>
         /// <remarks>
@@ -201,7 +201,7 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="ids">The optional ids of the content to fetch.</param>
         /// <param name="q">The optional json query.</param>
         /// <returns>
-        /// 200 => Contents retrieved.
+        /// 200 => Contents retunred.
         /// 404 => Schema or app not found.
         /// </returns>
         /// <remarks>
@@ -233,7 +233,7 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="name">The name of the schema.</param>
         /// <param name="query">The required query object.</param>
         /// <returns>
-        /// 200 => Contents retrieved.
+        /// 200 => Contents returned.
         /// 404 => Schema or app not found.
         /// </returns>
         /// <remarks>
@@ -265,7 +265,7 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="name">The name of the schema.</param>
         /// <param name="id">The id of the content to fetch.</param>
         /// <returns>
-        /// 200 => Content found.
+        /// 200 => Content returned.
         /// 404 => Content, schema or app not found.
         /// </returns>
         /// <remarks>
@@ -293,9 +293,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="id">The id of the content to fetch.</param>
         /// <param name="version">The version fo the content to fetch.</param>
         /// <returns>
-        /// 200 => Content found.
+        /// 200 => Content version returned.
         /// 404 => Content, schema or app not found.
-        /// 400 => Content data is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -323,8 +322,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="id">The optional custom content id.</param>
         /// <returns>
         /// 201 => Content created.
+        /// 400 => Content request not valid.
         /// 404 => Content, schema or app not found.
-        /// 400 => Content data is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -356,8 +355,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="request">The import request.</param>
         /// <returns>
         /// 201 => Contents created.
+        /// 400 => Content request not valid.
         /// 404 => Content references, schema or app not found.
-        /// 400 => Content data is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -387,8 +386,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="request">The bulk update request.</param>
         /// <returns>
         /// 201 => Contents created.
+        /// 400 => Content request not valid.
         /// 404 => Content references, schema or app not found.
-        /// 400 => Content data is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -420,8 +419,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="request">The full data for the content item.</param>
         /// <returns>
         /// 200 => Content updated.
+        /// 400 => Content request not valid.
         /// 404 => Content references, schema or app not found.
-        /// 400 => Content data is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -449,8 +448,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="request">The full data for the content item.</param>
         /// <returns>
         /// 200 => Content updated.
+        /// 400 => Content request not valid.
         /// 404 => Content references, schema or app not found.
-        /// 400 => Content data is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -478,8 +477,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="request">The patch for the content item.</param>
         /// <returns>
         /// 200 => Content patched.
+        /// 400 => Content request not valid.
         /// 404 => Content, schema or app not found.
-        /// 400 => Content patch is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -507,8 +506,8 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="request">The status request.</param>
         /// <returns>
         /// 200 => Content status changed.
+        /// 400 => Content request not valid.
         /// 404 => Content, schema or app not found.
-        /// 400 => Content request is not valid.
         /// </returns>
         /// <remarks>
         /// You can read the generated documentation for your app at /api/content/{appName}/docs.
@@ -590,6 +589,7 @@ namespace Squidex.Areas.Api.Controllers.Contents
         /// <param name="checkReferrers">True to check referrers of this content.</param>
         /// <returns>
         /// 204 => Content deleted.
+        /// 400 => Content cannot be deleted.
         /// 404 => Content, schema or app not found.
         /// </returns>
         /// <remarks>
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Rules/RulesController.cs b/backend/src/Squidex/Areas/Api/Controllers/Rules/RulesController.cs
index 82205e1d4..e7d70ac3a 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Rules/RulesController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Rules/RulesController.cs
@@ -107,7 +107,7 @@ namespace Squidex.Areas.Api.Controllers.Rules
         /// <param name="request">The rule object that needs to be added to the app.</param>
         /// <returns>
         /// 201 => Rule created.
-        /// 400 => Rule is not valid.
+        /// 400 => Rule request not valid.
         /// 404 => App not found.
         /// </returns>
         [HttpPost]
@@ -151,7 +151,7 @@ namespace Squidex.Areas.Api.Controllers.Rules
         /// <param name="request">The rule object that needs to be added to the app.</param>
         /// <returns>
         /// 200 => Rule updated.
-        /// 400 => Rule is not valid.
+        /// 400 => Rule request not valid.
         /// 404 => Rule or app not found.
         /// </returns>
         [HttpPut]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemaFieldsController.cs b/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemaFieldsController.cs
index b9ad5c1b5..59326b949 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemaFieldsController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemaFieldsController.cs
@@ -35,7 +35,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The field object that needs to be added to the schema.</param>
         /// <returns>
         /// 201 => Schema field created.
-        /// 400 => Schema field properties not valid.
+        /// 400 => Schema field request not valid.
         /// 404 => Schema or app not found.
         /// 409 => Schema field name already in use.
         /// </returns>
@@ -62,7 +62,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The field object that needs to be added to the schema.</param>
         /// <returns>
         /// 201 => Schema field created.
-        /// 400 => Schema field properties not valid.
+        /// 400 => Schema field request not valid.
         /// 409 => Schema field name already in use.
         /// 404 => Schema, field or app not found.
         /// </returns>
@@ -88,7 +88,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The request that contains the field names.</param>
         /// <returns>
         /// 200 => Schema UI fields defined.
-        /// 400 => Schema field contains invalid field names.
+        /// 400 => Schema field request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
@@ -113,7 +113,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The request that contains the field ids.</param>
         /// <returns>
         /// 200 => Schema fields reordered.
-        /// 400 => Schema field ids do not cover the fields of the schema.
+        /// 400 => Schema field request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
@@ -139,7 +139,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The request that contains the field ids.</param>
         /// <returns>
         /// 200 => Schema fields reordered.
-        /// 400 => Schema field ids do not cover the fields of the schema.
+        /// 400 => Schema field request not valid.
         /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpPut]
@@ -165,7 +165,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The field object that needs to be added to the schema.</param>
         /// <returns>
         /// 200 => Schema field updated.
-        /// 400 => Schema field properties not valid or field is locked.
+        /// 400 => Schema field request not valid.
         /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpPut]
@@ -192,7 +192,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The field object that needs to be added to the schema.</param>
         /// <returns>
         /// 200 => Schema field updated.
-        /// 400 => Schema field properties not valid or field is locked.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpPut]
@@ -217,6 +217,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to lock.</param>
         /// <returns>
         /// 200 => Schema field shown.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -245,6 +246,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to lock.</param>
         /// <returns>
         /// 200 => Schema field hidden.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Field, schema, or app not found.
         /// </returns>
         /// <remarks>
@@ -272,6 +274,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to hide.</param>
         /// <returns>
         /// 200 => Schema field hidden.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -300,6 +303,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to hide.</param>
         /// <returns>
         /// 200 => Schema field hidden.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Field, schema, or app not found.
         /// </returns>
         /// <remarks>
@@ -327,6 +331,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to show.</param>
         /// <returns>
         /// 200 => Schema field shown.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -355,6 +360,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to show.</param>
         /// <returns>
         /// 200 => Schema field shown.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -382,6 +388,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to enable.</param>
         /// <returns>
         /// 200 => Schema field enabled.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -410,6 +417,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to enable.</param>
         /// <returns>
         /// 200 => Schema field enabled.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -437,6 +445,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to disable.</param>
         /// <returns>
         /// 200 => Schema field disabled.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -465,6 +474,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to disable.</param>
         /// <returns>
         /// 200 => Schema field disabled.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         /// <remarks>
@@ -492,7 +502,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to disable.</param>
         /// <returns>
         /// 200 => Schema field deleted.
-        /// 400 => Field is locked.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpDelete]
@@ -518,7 +528,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="id">The id of the field to disable.</param>
         /// <returns>
         /// 200 => Schema field deleted.
-        /// 400 => Field is locked.
+        /// 400 => Schema field request not valid or field locked.
         /// 404 => Schema, field or app not found.
         /// </returns>
         [HttpDelete]
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemasController.cs b/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemasController.cs
index c1c7d96bb..bb07653f2 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemasController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Schemas/SchemasController.cs
@@ -112,7 +112,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The schema object that needs to be added to the app.</param>
         /// <returns>
         /// 201 => Schema created.
-        /// 400 => Schema name or properties are not valid.
+        /// 400 => Schema request not valid.
         /// 409 => Schema name already in use.
         /// </returns>
         [HttpPost]
@@ -137,7 +137,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The schema object that needs to updated.</param>
         /// <returns>
         /// 200 => Schema updated.
-        /// 400 => Schema properties are not valid.
+        /// 400 => Schema request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
@@ -162,7 +162,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The schema object that needs to updated.</param>
         /// <returns>
         /// 200 => Schema updated.
-        /// 400 => Schema properties are not valid.
+        /// 400 => Schema request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
@@ -187,6 +187,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The schema object that needs to updated.</param>
         /// <returns>
         /// 200 => Schema updated.
+        /// 400 => Schema request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
@@ -211,7 +212,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The preview urls for the schema.</param>
         /// <returns>
         /// 200 => Schema updated.
-        /// 400 => Schema urls are not valid.
+        /// 400 => Schema request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]
@@ -236,7 +237,7 @@ namespace Squidex.Areas.Api.Controllers.Schemas
         /// <param name="request">The schema scripts object that needs to updated.</param>
         /// <returns>
         /// 200 => Schema updated.
-        /// 400 => Schema scripts are not valid.
+        /// 400 => Schema request not valid.
         /// 404 => Schema or app not found.
         /// </returns>
         [HttpPut]