game_center_leaderboards_activity_update_to_one_relationship

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 verb (mutation) and deprecation status, but says nothing about required permissions, whether the to-one relationship is replaced or merged, or how failures behave. For a deprecated write tool this leaves major behavioral gaps.

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?

One sentence, with the deprecation warning usefully front-loaded. The PATCH path is duplicated verbatim inside parentheses, which is pure redundancy and wastes space.

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?

A deprecated mutation with a nested, opaque body object and no output schema. The description defers all body detail to an external OpenAPI component that the agent may not have in context, and omits the response semantics entirely, so it is not sufficient on its own.

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 points at components.schemas.GameCenterLeaderboardActivityLinkageRequest for the envelope, but that same pointer already appears in the body schema, so it adds little beyond structured data.

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 raw HTTP path reveals the tool mutates the 'activity' to-one relationship on a leaderboard, but the purpose is never stated in plain language and 'activity' linkage is never explained. It is also not differentiated from its near-identical sibling game_center_leaderboards_v2_activity_update_to_one_relationship, so an agent cannot easily choose between them.

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 '[DEPRECATED]' prefix is the only usage signal, and it does correctly warn the agent away. However, no replacement or alternative (notably the v2 variant) is named, and no condition for when this relationship update is appropriate is given.

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