game_center_challenges_leaderboard_update_to_one_relationship

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

With no annotations, the description carries full behavioral burden. PATCH implies a mutation, but the description never states what changes, whether the relationship is replaced vs. added, auth/permission requirements, or side effects. Only the deprecation status is disclosed.

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?

Reasonably short and front-loads the deprecation, but the URL is needlessly repeated verbatim inside parentheses, wasting tokens. The remaining content is a pointer to an external OpenAPI component rather than self-contained information.

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?

This is a mutation tool with no annotations, no output schema, and a free-form body relying on an external schema the agent may not have. The description omits what the operation does, what it replaces, and what supersedes it, leaving significant gaps for an agent to call it correctly.

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 id and body parameters are already documented. The description adds nothing beyond the schema; the body's shape reference to components.schemas.GameCenterChallengeLeaderboardLinkageRequest is already in the schema text. Baseline 3 applies.

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 restates the HTTP endpoint (PATCH /v1/gameCenterChallenges/{id}/relationships/leaderboard), which conveys a specific verb and resource, but it never states the purpose in plain language. It is largely a tautology of the tool name, though the [DEPRECATED] marker adds a useful signal.

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?

No when/when-not guidance or alternatives are given. A sibling, game_center_challenges_leaderboard_v2_update_to_one_relationship, clearly supersedes this v1 tool, yet the description only says DEPRECATED without routing the agent to the replacement. The deprecation tag is the sole usage hint.

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