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Get a user's most recent activity

get_user_recent_activity

Read-only

Retrieves an AniList user's five most recent activity posts across all types (list updates, text posts, and received messages). Accepts a username or ID directly to return full content without needing pre-search.

Instructions

Get an AniList user's 5 most recent activity posts, with full content (not just IDs) — every activity type (list updates, text posts, and message activity they received; the underlying query applies no type filter of its own), a fixed count, not configurable; use get_user_activity for a paginated full feed instead. Accepts an exact AniList username directly — no need to call search_user first unless you only have a partial/fuzzy name (username resolution costs one extra internal lookup either way).

Input Schema

Name	Required	Description	Default
`user`	Yes	AniList user ID, or username. An unknown ID or username errors rather than returning an empty feed.

Output Schema

Name	Required	Description	Default
`activity`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedv0.11.0Oct 25, 2026

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

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."

Changed3 schema fields changedv0.9.0Sep 27, 2026

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

Changed7 schema fields changedv0.7.1Aug 1, 2026

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 / activity / properties / activities / items / additionalProperties
```
Removed value: -{}
```

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

Changed14 schema fields changedv0.4.0Jul 28, 2026

addedOutput schema / properties / activity / properties / activities / items / properties / createdAt

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

addedOutput schema / properties / activity / properties / activities / items / properties / isLiked

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

addedOutput schema / properties / activity / properties / activities / items / properties / likeCount

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

addedOutput schema / properties / activity / properties / activities / items / properties / media

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

addedOutput schema / properties / activity / properties / activities / items / properties / message

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

addedOutput schema / properties / activity / properties / activities / items / properties / messenger

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "id": {
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "name": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / activity / properties / activities / items / properties / progress

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

addedOutput schema / properties / activity / properties / activities / items / properties / recipient

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "id": {
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "name": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / activity / properties / activities / items / properties / replyCount

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

addedOutput schema / properties / activity / properties / activities / items / properties / siteUrl

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

addedOutput schema / properties / activity / properties / activities / items / properties / status

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

addedOutput schema / properties / activity / properties / activities / items / properties / text

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

addedOutput schema / properties / activity / properties / activities / items / properties / type

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

addedOutput schema / properties / activity / properties / activities / items / properties / user

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "id": {
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "name": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "id"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

Addedv0.3.0Jul 26, 2026
Removedv0.2.0Jul 21, 2026
First observedv0.1.5Jul 21, 2026

TDQS

A4.6/5.0

Behavior4/5

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

Annotations already declare readOnlyHint and openWorldHint, but the description adds real behavioral context: fixed non-configurable count, no type filter applied by the underlying query, full content rather than IDs, and that username resolution costs an internal lookup either way. Covers most of the behavioral surface, though it does not mention failure modes beyond what the schema documents.

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?

Front-loaded with the core action and scope, then alternatives, then parameter behavior. Dense and largely waste-free, but the long parenthetical about activity types and the lookup-cost aside make it feel heavier than a one-param read tool needs.

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 covering return values and annotations covering safety, the description only needs to establish scope, alternatives and input behavior, and it does all three. Nothing an agent needs to call this correctly is missing.

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 already documents the ID-or-username union and that unknown values error. The description nonetheless adds callable-path meaning: an exact username can be passed directly without a search_user pre-call, and resolution cost is constant. That is genuine value beyond the schema, just for a single param.

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?

States a specific verb, resource and scope: the 5 most recent activity posts with full content, covering every activity type. It explicitly names the sibling it is not (get_user_activity) so an agent can route between them without opening schemas.

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?

Gives the alternative (get_user_activity for a paginated full feed) and the condition for choosing it, plus a precondition note about when search_user is and is not needed. This is exactly the when/when-not/alternatives guidance the dimension rewards.

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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