Roblox

User Games

user_games

Read-onlyIdempotent

Created games.

Example tool call

This call uses example arguments supplied in the tool’s input schema.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "user_id": 1
    },
    "name": "user_games"
  }
}

Input Schema

Name	Required	Description	Default
`limit`	No
`user_id`	Yes
`sortOrder`	No

Output Schema

Name	Required	Description	Default
`data`	No	Array of game objects
`nextPageCursor`	No	Cursor for pagination

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 19, 2026
- changedOutput schema / properties / nextPageCursor / type
```
Previous value: -"string"New value: +[
+  "string",
+  "null"
+]
```

Changed2 schema fields changedMay 22, 2026

addedInput schema / examples

Added value: +[
+  {
+    "user_id": 1
+  },
+  {
+    "limit": 25,
+    "sortOrder": "Desc",
+    "user_id": 1
+  }
+]

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "User created games response",
+  "properties": {
+    "data": {
+      "description": "Array of game objects",
+      "items": {
+        "properties": {
+          "created": {
+            "description": "Creation date (ISO 8601)",
+            "type": "string"
+          },
+          "description": {
+            "description": "Game description",
+            "type": "string"
+          },
+          "id": {
+            "description": "Game universe ID",
+            "type": "number"
+          },
+          "name": {
+            "description": "Game name",
+            "type": "string"
+          },
+          "rootPlaceId": {
+            "description": "Root place ID",
+            "type": "number"
+          },
+          "updated": {
+            "description": "Last updated date (ISO 8601)",
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "nextPageCursor": {
+      "description": "Cursor for pagination",
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

First observedMay 20, 2026

TDQS

D1.9/5.0

Behavior2/5

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

Annotations already supply readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, so the safety profile is covered. However, the description adds no behavioral context beyond the word 'created' and does not explain pagination, filtering, defaults, or any other runtime behavior.

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

Conciseness2/5

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

The description is short, but this is under-specification rather than effective conciseness. It saves words by omitting the action, usage context, and parameter meaning.

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

Completeness2/5

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

Although an output schema exists and annotations cover safety, the description still lacks a verb, parameter semantics, and sibling differentiation. An agent would have to guess whether this tool lists games, retrieves one game, or does something else.

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

Parameters1/5

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

Schema description coverage is 0%, so the description had the full burden of explaining user_id, limit, and sortOrder. It does not explain any of them; 'Created games' gives almost no semantic support for parameter interpretation.

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

Purpose2/5

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

The description is a noun phrase, not a statement of action: 'Created games.' essentially restates the title 'User Games' without naming an operation like 'list' or 'retrieve.' It also does nothing to distinguish this tool from siblings such as game or game_passes.

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?

There is no guidance about when to use this tool instead of related tools like user, game, user_friends, or game_passes. No context, exclusions, or alternative 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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