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vrchat_friend_details

Read-only

Retrieve a VRChat friend's profile, status, and current location using their display name or userId. Read-only operation provides details without modifying any data.

Instructions

Get a friend's profile, status, and location details by display name or userId (read-only).

Input Schema

TableJSON Schema

Name	Required	Description	Default
`name`	No
`userId`	No
`includeOffline`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
`group`	Yes
`world`	Yes
`friend`	Yes
`profile`	Yes
`instance`	Yes
`location`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedv0.1.13Sep 6, 2026

changedOutput schema / properties / instance / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "calendarEntryId": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "canRequestInvite": {
-        "default": true,
-        "type": "boolean"
-      },
-      "capacity": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "displayName": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "full": {
-        "default": false,
-        "type": "boolean"
-      },
-      "groupAccessType": {
-        "default": "members",
-        "enum": [
-          "members",
-          "plus",
-          "public"
-        ],
-        "type": "string"
-      },
-      "hasCapacityForYou": {
-        "type": "boolean"
-      },
-      "id": {
-        "type": "string"
-      },
-      "instanceId": {
-        "type": "string"
-      },
-      "location": {
-        "type": "string"
-      },
-      "n_users": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "name": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "photonRegion": {
-        "enum": [
-          "eu",
-          "jp",
-          "unknown",
-          "us",
-          "use",
-          "usw",
-          "usx"
-        ],
-        "type": "string"
-      },
-      "queueEnabled": {
-        "type": "boolean"
-      },
-      "queueSize": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "recommendedCapacity": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "region": {
-        "enum": [
-          "eu",
-          "jp",
-          "unknown",
-          "us",
-          "use",
-          "usw",
-          "usx"
-        ],
-        "type": "string"
-      },
-      "shortName": {
-        "anyOf": [
-          {
-            "minLength": 1,
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "tags": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "type": {
-        "enum": [
-          "friends",
-          "group",
-          "hidden",
-          "private",
-          "public"
-        ],
-        "type": "string"
-      },
-      "userCount": {
-        "maximum": 9007199254740991,
-        "minimum": 0,
-        "type": "integer"
-      },
-      "worldId": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "calendarEntryId": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "canRequestInvite": {
+        "default": true,
+        "type": "boolean"
+      },
+      "capacity": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "displayName": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "full": {
+        "default": false,
+        "type": "boolean"
+      },
+      "groupAccessType": {
+        "default": "members",
+        "enum": [
+          "members",
+          "plus",
+          "public"
+        ],
+        "type": "string"
+      },
+      "hasCapacityForYou": {
+        "type": "boolean"
+      },
+      "id": {
+        "type": "string"
+      },
+      "instanceId": {
+        "type": "string"
+      },
+      "location": {
+        "type": "string"
+      },
+      "n_users": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "name": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "photonRegion": {
+        "enum": [
+          "eu",
+          "jp",
+          "unknown",
+          "us",
+          "use",
+          "usw",
+          "usx"
+        ],
+        "type": "string"
+      },
+      "queueEnabled": {
+        "type": "boolean"
+      },
+      "queueSize": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "recommendedCapacity": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "region": {
+        "enum": [
+          "eu",
+          "jp",
+          "unknown",
+          "us",
+          "use",
+          "usw",
+          "usx"
+        ],
+        "type": "string"
+      },
+      "shortName": {
+        "anyOf": [
+          {
+            "minLength": 1,
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "tags": {
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "type": {
+        "enum": [
+          "friends",
+          "group",
+          "hidden",
+          "private",
+          "public"
+        ],
+        "type": "string"
+      },
+      "userCount": {
+        "maximum": 9007199254740991,
+        "minimum": 0,
+        "type": "integer"
+      },
+      "worldId": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / location / properties / raw / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / location / properties / raw / type
```
Added value: +[
+  "string",
+  "null"
+]
```

First observedv0.1.8Jul 29, 2026

TDQS

B3.2/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, and the description's '(read-only)' merely restates that rather than adding new information. It adds modest context about what is returned (profile, status, location) and hints at offline filtering via the includeOffline parameter, but does not state behavior for missing or offline friends, auth needs, or rate limits. No contradiction with annotations.

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?

A single, front-loaded sentence that communicates the action, the resource, and the lookup keys efficiently. The only minor waste is the '(read-only)' parenthetical, which duplicates the readOnlyHint annotation.

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

Completeness3/5

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

Adequate for a read-only lookup that has an output schema, but real gaps remain: the includeOffline parameter's semantics are undocumented, whether name and userId are mutually exclusive is unstated, and no distinction is drawn from vrchat_user_profile, which likely serves a nearly identical purpose.

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 0%, so the description must compensate. It does clarify that 'name' and 'userId' are alternative lookup mechanisms, adding real meaning for two of three parameters. However, 'includeOffline' is left entirely unexplained, so the compensation is only partial.

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 ('Get'), a concrete resource ('a friend's profile, status, and location details'), and the lookup keys ('by display name or userId'). The 'friend's' scope implicitly differentiates it from vrchat_user_profile and vrchat_me, though no sibling is named explicitly.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus overlapping siblings such as vrchat_user_profile, vrchat_friends_list, or vrchat_friends_search, all of which appear in the sibling list. No when-to-use, when-not-to-use, or alternative-selection conditions are provided.

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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