game_center_leaderboard_set_member_localizations_update_instance

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

No annotations are provided, so the description carries the full burden. It discloses the PATCH method, which implies a partial update, and points to an external body schema. However, it says nothing about required permissions, idempotency, side effects, error behavior, or what happens to unspecified fields. This is insufficient for a mutation tool.

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

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

The description is short and front-loads the endpoint, but it duplicates the PATCH path in parentheses, which is wasted space. The single external schema reference is compact but does not make the definition self-contained or especially useful.

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

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

For a mutation tool with a nested JSON:API body, no annotations, and no output schema, the description is incomplete. It points to an external OpenAPI schema for the body shape but does not explain the JSON:API envelope, required fields, response behavior, or operational context. It cannot stand on its own for correct invocation.

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

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

Schema description coverage is 100%, so the baseline is 3. The description adds only that the request body follows the OpenAPI components.schemas.GameCenterLeaderboardSetMemberLocalizationUpdateRequest shape, which mirrors the schema's own reference and does not add meaning beyond what is already documented.

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

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

The description merely restates the HTTP endpoint and method from the tool name: 'PATCH /v1/gameCenterLeaderboardSetMemberLocalizations/{id}'. It does not state in plain language what resource is being updated or what the operation accomplishes. An agent can infer 'update' from PATCH and the name, but the description itself adds little semantic clarity.

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

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

The description provides no guidance on when to use this tool, when not to use it, or how it relates to sibling tools such as get, create, or delete instance operations for the same resource. No prerequisites, permissions, or alternatives are mentioned.

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