AniList MCP Server

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Get a user's activity feed

get_user_activity

Read-only

Get a specific user's recent AniList activity (list updates, text posts, messages) with pagination, using their exact username or ID directly — no separate user search required.

Instructions

List recent AniList activity posts from a specific user — every activity type (list updates, text posts, and message activity they received), the underlying query applies no type filter of its own. Accepts an exact AniList username directly (it's resolved to an id with one extra internal lookup) — no need to call search_user first unless you only have a partial/fuzzy name. Use search_activity instead if you want to restrict to one activity type (TEXT/ANIME_LIST/MANGA_LIST/MEDIA_LIST/MESSAGE) or browse without pinning to one user. Use get_user_recent_activity instead if you just want a quick, fixed-size (5-item) recent snapshot without paginating.

Input Schema

TableJSON Schema

Name	Required	Description
`page`	No	Page number for pagination. AniList's paginated connections (search results, a title's characters/staff/reviews, activity feeds, forum comments) reject a page whose page × perPage exceeds ~5000 entries with an upstream error, so paging that deep fails rather than returning more results.
`user`	Yes	AniList user ID, or username. Unlike search_activity's own `user` filter, both an unknown numeric ID and an unknown username error here rather than silently returning an empty feed.
`perPage`	No	Results per page (max 50, AniList's own ceiling — it silently clamps anything higher).

Output Schema

TableJSON Schema

Name	Required	Description	Default
`results`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed5 schema fields changedv0.9.0Sep 27, 2026

changedInput schema / properties / perPage / description

Previous value: -"Results per page (max 25)."New value: +"Results per page (max 50, AniList's own ceiling — it silently clamps anything higher)."

changedInput schema / properties / perPage / maximum
```
Previous value: -25New value: +50
```

changedOutput schema / properties / results / properties / activities / items / oneOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "createdAt": {
-        "anyOf": [
-          {
-            "minimum": 0,
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "id": {
-        "exclusiveMinimum": 0,
-        "maximum": 2147483647,
-        "type": "integer"
-      },
-      "isLiked": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "likeCount": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "replyCount": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "siteUrl": {
-        "anyOf": [
-          {
-            "format": "uri",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "text": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "type": {
-        "const": "TEXT",
-        "type": "string"
-      },
-      "user": {
-        "anyOf": [
-          {
-            "additionalProperties": {},
-            "properties": {
-              "id": {
-                "exclusiveMinimum": 0,
-                "maximum": 2147483647,
-                "type": "integer"
-              },
-              "name": {
-                "anyOf": [
-                  {
-                    "type": "string"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              }
-            },
-            "required": [
-              "id"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "required": [
-      "id",
-      "type"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "createdAt": {
-        "anyOf": [
-          {
-            "minimum": 0,
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "id": {
-        "exclusiveMinimum": 0,
-        "maximum": 2147483647,
-        "type": "integer"
-      },
-      "isLiked": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "likeCount": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "media": {
-        "anyOf": [
-          {
-            "additionalProperties": {},
-            "properties": {
-              "id": {
-                "exclusiveMinimum": 0,
-                "maximum": 2147483647,
-                "type": "integer"
-              },
-              "title": {
-                "anyOf": [
-                  {
-                    "additionalProperties": false,
-                    "properties": {
-                      "english": {
-                        "anyOf": [
-                          {
-                            "type": "string"
-                          },
-                          {
-                            "type": "null"
-                          }
-                        ]
-                      },
-                      "romaji": {
-                        "anyOf": [
-                          {
-                            "type": "string"
-                          },
-                          {
-                            "type": "null"
-                          }
-                        ]
-                      }
-                    },
-                    "type": "object"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              }
-            },
-            "required": [
-              "id"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "progress": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "replyCount": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "siteUrl": {
-        "anyOf": [
-          {
-            "format": "uri",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "status": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "type": {
-        "enum": [
-          "ANIME_LIST",
-          "MANGA_LIST",
-          "MEDIA_LIST"
-        ],
-        "type": "string"
-      },
-      "user": {
-        "anyOf": [
-          {
-            "additionalProperties": {},
-            "properties": {
-              "id": {
-                "exclusiveMinimum": 0,
-                "maximum": 2147483647,
-                "type": "integer"
-              },
-              "name": {
-                "anyOf": [
-                  {
-                    "type": "string"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              }
-            },
-            "required": [
-              "id"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "required": [
-      "id",
-      "type"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "createdAt": {
-        "anyOf": [
-          {
-            "minimum": 0,
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "id": {
-        "exclusiveMinimum": 0,
-        "maximum": 2147483647,
-        "type": "integer"
-      },
-      "isLiked": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "likeCount": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "message": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "messenger": {
-        "anyOf": [
-          {
-            "additionalProperties": {},
-            "properties": {
-              "id": {
-                "exclusiveMinimum": 0,
-                "maximum": 2147483647,
-                "type": "integer"
-              },
-              "name": {
-                "anyOf": [
-                  {
-                    "type": "string"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              }
-            },
-            "required": [
-              "id"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "recipient": {
-        "anyOf": [
-          {
-            "additionalProperties": {},
-            "properties": {
-              "id": {
-                "exclusiveMinimum": 0,
-                "maximum": 2147483647,
-                "type": "integer"
-              },
-              "name": {
-                "anyOf": [
-                  {
-                    "type": "string"
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              }
-            },
-            "required": [
-              "id"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "replyCount": {
-        "anyOf": [
-          {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "siteUrl": {
-        "anyOf": [
-          {
-            "format": "uri",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "type": {
-        "const": "MESSAGE",
-        "type": "string"
-      }
-    },
-    "required": [
-      "id",
-      "type"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "createdAt": {
+        "anyOf": [
+          {
+            "minimum": 0,
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "id": {
+        "exclusiveMinimum": 0,
+        "maximum": 2147483647,
+        "type": "integer"
+      },
+      "isLiked": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "likeCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "replyCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "siteUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "text": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "type": {
+        "const": "TEXT",
+        "type": "string"
+      },
+      "user": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "required": [
+      "id",
+      "type"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "createdAt": {
+        "anyOf": [
+          {
+            "minimum": 0,
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "id": {
+        "exclusiveMinimum": 0,
+        "maximum": 2147483647,
+        "type": "integer"
+      },
+      "isLiked": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "likeCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "media": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "title": {
+                "anyOf": [
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "english": {
+                        "type": [
+                          "string",
+                          "null"
+                        ]
+                      },
+                      "romaji": {
+                        "type": [
+                          "string",
+                          "null"
+                        ]
+                      }
+                    },
+                    "type": "object"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "progress": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "replyCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "siteUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "status": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "type": {
+        "enum": [
+          "ANIME_LIST",
+          "MANGA_LIST",
+          "MEDIA_LIST"
+        ],
+        "type": "string"
+      },
+      "user": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "required": [
+      "id",
+      "type"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "createdAt": {
+        "anyOf": [
+          {
+            "minimum": 0,
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "id": {
+        "exclusiveMinimum": 0,
+        "maximum": 2147483647,
+        "type": "integer"
+      },
+      "isLiked": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "likeCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "message": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "messenger": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "recipient": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "replyCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "siteUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "type": {
+        "const": "MESSAGE",
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "type"
+    ],
+    "type": "object"
+  }
+]

removedOutput schema / properties / results / properties / pageInfo / properties / hasNextPage / anyOf
```
Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]
```
addedOutput schema / properties / results / properties / pageInfo / properties / hasNextPage / type
```
Added value: +[
+  "boolean",
+  "null"
+]
```

Changed10 schema fields changedv0.7.1Aug 1, 2026

changedInput schema / properties / page / description

Previous value: -"Page number for pagination."New value: +"Page number for pagination. AniList's paginated connections (search results, a title's characters/staff/reviews, activity feeds, forum comments) reject a page whose page × perPage exceeds ~5000 entries with an upstream error, so paging that deep fails rather than returning more results."

addedInput schema / properties / perPage / exclusiveMinimum
```
Added value: +0
```
removedInput schema / properties / perPage / minimum
```
Removed value: -1
```

changedInput schema / properties / user / anyOf

Previous value: -[
-  {
-    "maximum": 2147483647,
-    "minimum": -2147483648,
-    "type": "integer"
-  },
-  {
-    "minLength": 1,
-    "type": "string"
-  }
-]New value: +[
+  {
+    "exclusiveMinimum": 0,
+    "maximum": 2147483647,
+    "type": "integer"
+  },
+  {
+    "minLength": 1,
+    "type": "string"
+  }
+]

changedInput schema / properties / user / description

Previous value: -"AniList user ID, or username."New value: +"AniList user ID, or username. Unlike search_activity's own `user` filter, both an unknown numeric ID and an unknown username error here rather than silently returning an empty feed."

removedOutput schema / properties / results / properties / activities / items / additionalProperties
```
Removed value: -{}
```

addedOutput schema / properties / results / properties / activities / items / oneOf

Added value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "createdAt": {
+        "anyOf": [
+          {
+            "minimum": 0,
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "id": {
+        "exclusiveMinimum": 0,
+        "maximum": 2147483647,
+        "type": "integer"
+      },
+      "isLiked": {
+        "anyOf": [
+          {
+            "type": "boolean"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "likeCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "replyCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "siteUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "text": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "type": {
+        "const": "TEXT",
+        "type": "string"
+      },
+      "user": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "required": [
+      "id",
+      "type"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "createdAt": {
+        "anyOf": [
+          {
+            "minimum": 0,
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "id": {
+        "exclusiveMinimum": 0,
+        "maximum": 2147483647,
+        "type": "integer"
+      },
+      "isLiked": {
+        "anyOf": [
+          {
+            "type": "boolean"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "likeCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "media": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "title": {
+                "anyOf": [
+                  {
+                    "additionalProperties": false,
+                    "properties": {
+                      "english": {
+                        "anyOf": [
+                          {
+                            "type": "string"
+                          },
+                          {
+                            "type": "null"
+                          }
+                        ]
+                      },
+                      "romaji": {
+                        "anyOf": [
+                          {
+                            "type": "string"
+                          },
+                          {
+                            "type": "null"
+                          }
+                        ]
+                      }
+                    },
+                    "type": "object"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "progress": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "replyCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "siteUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "status": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "type": {
+        "enum": [
+          "ANIME_LIST",
+          "MANGA_LIST",
+          "MEDIA_LIST"
+        ],
+        "type": "string"
+      },
+      "user": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      }
+    },
+    "required": [
+      "id",
+      "type"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "createdAt": {
+        "anyOf": [
+          {
+            "minimum": 0,
+            "type": "number"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "id": {
+        "exclusiveMinimum": 0,
+        "maximum": 2147483647,
+        "type": "integer"
+      },
+      "isLiked": {
+        "anyOf": [
+          {
+            "type": "boolean"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "likeCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "message": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "messenger": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "recipient": {
+        "anyOf": [
+          {
+            "additionalProperties": {},
+            "properties": {
+              "id": {
+                "exclusiveMinimum": 0,
+                "maximum": 2147483647,
+                "type": "integer"
+              },
+              "name": {
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              }
+            },
+            "required": [
+              "id"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "replyCount": {
+        "anyOf": [
+          {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "siteUrl": {
+        "anyOf": [
+          {
+            "format": "uri",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "type": {
+        "const": "MESSAGE",
+        "type": "string"
+      }
+    },
+    "required": [
+      "id",
+      "type"
+    ],
+    "type": "object"
+  }
+]

removedOutput schema / properties / results / properties / activities / items / properties

Removed value: -{
-  "createdAt": {
-    "anyOf": [
-      {
-        "type": "number"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "id": {
-    "maximum": 9007199254740991,
-    "minimum": -9007199254740991,
-    "type": "integer"
-  },
-  "isLiked": {
-    "anyOf": [
-      {
-        "type": "boolean"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "likeCount": {
-    "anyOf": [
-      {
-        "maximum": 9007199254740991,
-        "minimum": -9007199254740991,
-        "type": "integer"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "media": {
-    "anyOf": [
-      {
-        "additionalProperties": {},
-        "properties": {
-          "id": {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          "title": {
-            "anyOf": [
-              {
-                "additionalProperties": false,
-                "properties": {
-                  "english": {
-                    "anyOf": [
-                      {
-                        "type": "string"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "romaji": {
-                    "anyOf": [
-                      {
-                        "type": "string"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  }
-                },
-                "type": "object"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          }
-        },
-        "required": [
-          "id"
-        ],
-        "type": "object"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "message": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "messenger": {
-    "anyOf": [
-      {
-        "additionalProperties": {},
-        "properties": {
-          "id": {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          "name": {
-            "anyOf": [
-              {
-                "type": "string"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          }
-        },
-        "required": [
-          "id"
-        ],
-        "type": "object"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "progress": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "recipient": {
-    "anyOf": [
-      {
-        "additionalProperties": {},
-        "properties": {
-          "id": {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          "name": {
-            "anyOf": [
-              {
-                "type": "string"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          }
-        },
-        "required": [
-          "id"
-        ],
-        "type": "object"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "replyCount": {
-    "anyOf": [
-      {
-        "maximum": 9007199254740991,
-        "minimum": -9007199254740991,
-        "type": "integer"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "siteUrl": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "status": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "text": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "type": {
-    "anyOf": [
-      {
-        "type": "string"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  },
-  "user": {
-    "anyOf": [
-      {
-        "additionalProperties": {},
-        "properties": {
-          "id": {
-            "maximum": 9007199254740991,
-            "minimum": -9007199254740991,
-            "type": "integer"
-          },
-          "name": {
-            "anyOf": [
-              {
-                "type": "string"
-              },
-              {
-                "type": "null"
-              }
-            ]
-          }
-        },
-        "required": [
-          "id"
-        ],
-        "type": "object"
-      },
-      {
-        "type": "null"
-      }
-    ]
-  }
-}

removedOutput schema / properties / results / properties / activities / items / required
```
Removed value: -[
-  "id"
-]
```
removedOutput schema / properties / results / properties / activities / items / type
```
Removed value: -"object"
```

Addedv0.3.0Jul 26, 2026
Removedv0.2.0Jul 21, 2026

Changed3 schema fields changedv0.2.0Jul 21, 2026

addedOutput schema / properties / results / properties / activities / items / properties / isLiked

Added value: +{
+  "anyOf": [
+    {
+      "type": "boolean"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / results / properties / activities / items / properties / likeCount

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / results / properties / activities / items / properties / replyCount

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

First observedv0.1.5Jul 21, 2026

TDQS

A4.9/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already signal readOnlyHint=true, and the description adds meaningful context beyond that: no type filter in the underlying query, direct username resolution with one extra internal lookup, and the implied difference from search_activity's silent-empty behavior. These traits help an agent predict what will happen before invoking the tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences with zero filler: scope, username-resolution behavior, and two sibling-tool routing rules. The main purpose is front-loaded, and every sentence carries information an agent would otherwise have to infer or test.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present, a rich input schema, and strong annotations, the description still adds the missing contextual glue: how username handling differs, when not to call search_user, and which siblings cover adjacent use cases. Nothing needed to invoke or select the tool correctly is left unspecified.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and each parameter is already documented in detail, so the baseline is 3. The description adds real value for the 'user' parameter by stating that an exact username is accepted directly and that search_user is unnecessary, which clarifies a common usage decision beyond the schema's anyOf definition.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb+resource: 'List recent AniList activity posts from a specific user,' and immediately clarifies scope ('every activity type… underlying query applies no type filter'). It also distinguishes itself from search_activity and get_user_recent_activity, so an agent can pick it without opening a schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit when-to-use guidance is front and center: it says there's no need to call search_user first for exact usernames, points to search_activity when filtering by type or browsing without a user, and points to get_user_recent_activity for a non-paginated 5-item snapshot. Exclusions and alternatives are both named.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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