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Get a user's activity feed

get_user_activity

Read-only

Retrieve a user's recent AniList activity posts, newest first, filtered by type or a created-after/before date window so you can pull only the feed items you need instead of paging through everything.

Instructions

List recent AniList activity posts from a specific user, newest first — by default every activity type (list updates, text posts, and message activity they received). Narrow it server-side with type and/or a createdAfter/createdBefore window rather than paging through everything and discarding. 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 to 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

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.
`type`	No	Restrict to this activity type, or pass an array to match ANY of several (e.g. ["TEXT", "MESSAGE"]). MEDIA_LIST matches both ANIME_LIST and MANGA_LIST activities; use ANIME_LIST/MANGA_LIST to restrict to just one. MESSAGE here is messages this user received. Omit for every type.
`user`	Yes	AniList user ID, or username. An unknown ID or username errors rather than returning an empty feed.
`perPage`	No	Results per page (max 50, AniList's own ceiling — it silently clamps anything higher).
`createdAfter`	No	Only activities created strictly after this moment — an ISO 8601 datetime with a `Z` or ±hh:mm offset (e.g. 2026-01-01T00:00:00Z). AniList stores whole seconds; an activity at exactly this second is excluded.
`createdBefore`	No	Only activities created strictly before this moment — same format and exclusive bound as `createdAfter`. A window where createdBefore is not after createdAfter just returns no activities, not an error.

Output Schema

Name	Required	Description	Default
`results`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed5 schema fields changedv0.11.0Oct 25, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

addedInput schema / properties / createdAfter

Added value: +{
+  "description": "Only activities created strictly after this moment — an ISO 8601 datetime with a `Z` or ±hh:mm offset (e.g. 2026-01-01T00:00:00Z). AniList stores whole seconds; an activity at exactly this second is excluded.",
+  "format": "date-time",
+  "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$",
+  "type": "string"
+}

addedInput schema / properties / createdBefore

Added value: +{
+  "description": "Only activities created strictly before this moment — same format and exclusive bound as `createdAfter`. A window where createdBefore is not after createdAfter just returns no activities, not an error.",
+  "format": "date-time",
+  "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$",
+  "type": "string"
+}

addedInput schema / properties / type

Added value: +{
+  "anyOf": [
+    {
+      "enum": [
+        "TEXT",
+        "ANIME_LIST",
+        "MANGA_LIST",
+        "MESSAGE",
+        "MEDIA_LIST"
+      ],
+      "type": "string"
+    },
+    {
+      "items": {
+        "enum": [
+          "TEXT",
+          "ANIME_LIST",
+          "MANGA_LIST",
+          "MESSAGE",
+          "MEDIA_LIST"
+        ],
+        "type": "string"
+      },
+      "minItems": 1,
+      "type": "array"
+    }
+  ],
+  "description": "Restrict to this activity type, or pass an array to match ANY of several (e.g. [\"TEXT\", \"MESSAGE\"]). MEDIA_LIST matches both ANIME_LIST and MANGA_LIST activities; use ANIME_LIST/MANGA_LIST to restrict to just one. MESSAGE here is messages this user received. Omit for every type."
+}

changedInput schema / properties / user / description

Previous 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."New value: +"AniList user ID, or username. An unknown ID or username errors rather than returning an empty feed."

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

A4.7/5.0

Behavior4/5

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

Annotations already declare readOnlyHint and openWorldHint, and the description adds genuinely non-obvious behavior: the username is resolved to an id with one extra internal lookup, and an unknown ID/username errors rather than returning an empty feed. It does not discuss ordering guarantees across pages or rate limits, which keeps it short of a 5 given the lowered bar annotations provide.

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?

Four sentences, each carrying distinct information: scope, filtering strategy, username handling, then two explicit alternative routings. Nothing is redundant and the core scope is front-loaded.

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, return-value explanation is unnecessary, and the six parameters are fully documented in the schema. The description closes the remaining gaps an agent would care about — naming semantics, error-on-unknown-user behavior, and which sibling to use instead.

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%, so the baseline is 3; the description goes further by stating the default (all activity types) and by explaining the intended use of `type` and the createdAfter/createdBefore window as server-side narrowing levers rather than post-filtering. It slightly exceeds the schema's own field-level docs without duplicating them.

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?

Opens with a specific verb and resource ('List recent AniList activity posts from a specific user, newest first') plus the default scope (every activity type, with the types enumerated). An agent can distinguish this from search_activity and get_user_recent_activity without opening any 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?

Explicitly routes away from two siblings: 'Use search_activity instead to browse without pinning to one user' and 'Use get_user_recent_activity instead if you just want a quick, fixed-size (5-item) recent snapshot without paginating.' It also tells the agent to filter server-side with type/createdAfter/createdBefore rather than paging and discarding, and clarifies that calling search_user first is unnecessary.

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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