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Search activity feed

search_activity

Read-only

Search and browse AniList activity feeds by user, type, following status, or creation-time window; results include full post content and engagement counts, so no follow-up call is needed.

Instructions

Search/browse AniList's activity feed (list updates, text posts, messages), optionally filtered to one user or — with isFollowing [Requires login] — to your following feed, to one or more activity types, and/or to a creation-time window. Each result already includes its full content (text/message/status, replyCount/likeCount/isLiked, the posting user, and — for list activity — the media) — no follow-up get_activity call needed unless you need to re-check one specific result's replyCount/likeCount/isLiked later (e.g. after liking it).

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. Omit for every type.
`user`	No	Restrict results to this AniList user — numeric ID or exact username (resolved to an id with one extra internal lookup; no need to call search_user first unless you only have a partial/fuzzy name). An unknown ID or username errors with not_found rather than silently returning an empty result.
`perPage`	No	Results per page (max 50, AniList's own ceiling — it silently clamps anything higher).
`isFollowing`	No	[Requires login] Set true for your following feed: activity from users the logged-in account follows plus its own (AniList's `isFollowing` filter — confirmed live: an account following nobody gets only its own activity). Without a token this errors before any request rather than returning the global feed. Can't be combined with `user`. false or omitted means no restriction.
`createdAfter`	No	Only activity created strictly after this ISO 8601 datetime with an offset (e.g. "2026-10-01T00:00:00Z"); compared at whole-second precision.
`createdBefore`	No	Only activity created strictly before this ISO 8601 datetime.

Output Schema

Name	Required	Description	Default
`results`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed9 schema fields changedv0.11.0Oct 25, 2026

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

addedInput schema / properties / createdAfter

Added value: +{
+  "description": "Only activity created strictly after this ISO 8601 datetime with an offset (e.g. \"2026-10-01T00:00:00Z\"); compared at whole-second precision.",
+  "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 activity created strictly before this ISO 8601 datetime.",
+  "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 / isFollowing

Added value: +{
+  "description": "[Requires login] Set true for your following feed: activity from users the logged-in account follows plus its own (AniList's `isFollowing` filter — confirmed live: an account following nobody gets only its own activity). Without a token this errors before any request rather than returning the global feed. Can't be combined with `user`. false or omitted means no restriction.",
+  "type": "boolean"
+}

addedInput schema / properties / type / anyOf

Added value: +[
+  {
+    "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"
+  }
+]

changedInput schema / properties / type / description

Previous value: -"Restrict to this activity type. MEDIA_LIST matches both ANIME_LIST and MANGA_LIST activities; use ANIME_LIST/MANGA_LIST to restrict to just one."New value: +"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. Omit for every type."

removedInput schema / properties / type / enum

Removed value: -[
-  "TEXT",
-  "ANIME_LIST",
-  "MANGA_LIST",
-  "MESSAGE",
-  "MEDIA_LIST"
-]

removedInput schema / properties / type / type
```
Removed value: -"string"
```

changedInput schema / properties / user / description

Previous value: -"Restrict results to this AniList user — numeric ID or exact username (resolved to an id with one extra internal lookup; no need to call search_user first unless you only have a partial/fuzzy name). An unknown ID or username errors with not_found rather than silently returning an empty result. Use get_user_activity instead if you only need one user's feed without the type filter."New value: +"Restrict results to this AniList user — numeric ID or exact username (resolved to an id with one extra internal lookup; no need to call search_user first unless you only have a partial/fuzzy name). An unknown ID or username errors with not_found rather than silently returning an empty result."

Changed6 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
```

changedInput schema / properties / user / description

Previous value: -"Restrict results to this AniList user — numeric ID or exact username (resolved to an id with one extra internal lookup; no need to call search_user first unless you only have a partial/fuzzy name). Validation is asymmetric: an unknown USERNAME errors ('No AniList user named ... was found'), but an unknown numeric ID does NOT — it silently returns an empty result, indistinguishable from 'this user has no matching activity'. Resolve a numeric ID via search_user first if you need to confirm the account actually exists. Use get_user_activity instead if you only need one user's feed without the type filter."New value: +"Restrict results to this AniList user — numeric ID or exact username (resolved to an id with one extra internal lookup; no need to call search_user first unless you only have a partial/fuzzy name). An unknown ID or username errors with not_found rather than silently returning an empty result. Use get_user_activity instead if you only need one user's feed without the type filter."

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"
+  }
+]

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

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

Removed value: -"Only `id` is guaranteed here — the real object has more fields, but their shape depends on which variant of an underlying union type this is (e.g. which activity type), so only the field common to every variant is declared."

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: -{
-  "id": {
-    "maximum": 9007199254740991,
-    "minimum": -9007199254740991,
-    "type": "integer"
-  }
-}

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

Changed2 schema fields changedv0.4.0Jul 28, 2026

changedInput schema / properties / user / description

Previous value: -"Restrict results to this AniList user — numeric ID or exact username (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 get_user_activity instead if you only need one user's feed without the type filter."New value: +"Restrict results to this AniList user — numeric ID or exact username (resolved to an id with one extra internal lookup; no need to call search_user first unless you only have a partial/fuzzy name). Validation is asymmetric: an unknown USERNAME errors ('No AniList user named ... was found'), but an unknown numeric ID does NOT — it silently returns an empty result, indistinguishable from 'this user has no matching activity'. Resolve a numeric ID via search_user first if you need to confirm the account actually exists. Use get_user_activity instead if you only need one user's feed without the type filter."

addedOutput schema / properties / results / properties / activities / items / description

Added value: +"Only `id` is guaranteed here — the real object has more fields, but their shape depends on which variant of an underlying union type this is (e.g. which activity type), so only the field common to every variant is declared."

Changed2 schema fields changedv0.3.0Jul 26, 2026

addedInput schema / properties / user

Added value: +{
+  "anyOf": [
+    {
+      "maximum": 2147483647,
+      "minimum": -2147483648,
+      "type": "integer"
+    },
+    {
+      "minLength": 1,
+      "type": "string"
+    }
+  ],
+  "description": "Restrict results to this AniList user — numeric ID or exact username (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 get_user_activity instead if you only need one user's feed without the type filter."
+}

removedInput schema / properties / userId

Removed value: -{
-  "description": "Restrict results to this AniList user ID — numeric only; resolve one via search_user first, or use get_user_activity instead if you already have an exact username.",
-  "maximum": 2147483647,
-  "minimum": -2147483648,
-  "type": "integer"
-}

Addedv0.2.0Jul 21, 2026

TDQS

A4.1/5.0

Behavior5/5

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

Goes well past the readOnlyHint/openWorldHint annotations: it discloses that each result embeds content, counts, isLiked, user and media, that isFollowing errors before any request without a token (and returns only own activity if following nobody), and that an unknown user errors with not_found rather than an empty list. These are exactly the behavioral facts an agent needs before calling.

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

Conciseness4/5

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

Two sentences, front-loaded with the resource and filter set, then the return-content/exclusion note. The nested parentheticals and em-dashes make it dense, but every clause carries information an agent would otherwise have to infer.

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

Completeness4/5

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

With an output schema present, the description doesn't need to restate return shape, yet it summarizes what comes back and covers auth, error, and no-follow-up-call behavior — enough to invoke correctly. The one gap is not steering the agent away from overlapping siblings when a single user's feed is the actual goal.

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

Parameters3/5

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

Schema description coverage is 100%, so the schema already explains pagination limits, perPage clamping, enum/array behavior for type, and the createdBefore/createdAfter precision. The description only echoes the filtering dimensions and the [Requires login] tag for isFollowing, adding little beyond structured fields. Baseline 3 applies.

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

Purpose4/5

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

States a specific verb+resource ('Search/browse AniList's activity feed') and enumerates the activity subtypes (list updates, text posts, messages) plus the filterable dimensions. Scope is clear enough to distinguish it from the single-activity sibling get_activity, though it never names get_user_activity or get_user_recent_activity, leaving that separation implicit.

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

Usage Guidelines4/5

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

Gives actionable routing advice: no follow-up get_activity call is needed because results carry full content, unless you later need to re-check a specific result's counts, and no search_user call is needed for exact usernames. It also states the isFollowing login precondition and that it can't combine with user. It stops short of explicitly contrasting with get_user_activity/get_user_recent_activity.

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

Deploy Server

Search activity feed

Instructions

Input Schema

Output Schema

Schema Changelog

TDQS

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