game_center_leaderboard_images_v2_create_instance

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

No annotations are provided, so the description carries the full behavioral burden, and it discloses nothing: no authentication requirements, no note that this mutates state and creates a new resource, no constraints on the image, and no indication of what the JSON:API envelope must contain beyond a pointer to an external schema. For a mutation tool with zero annotation coverage this is a complete gap.

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 but wastes its opening on a literal duplicate: 'POST /v2/gameCenterLeaderboardImages (POST /v2/gameCenterLeaderboardImages)'. That parenthetical earns nothing, and the remaining sentence only defers to an external schema reference.

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 create operation on a nested JSON:API envelope with no annotations and no output schema, the description is far too thin. It never explains what resource is produced, what the body must contain, or any required relationships, leaving the agent dependent on an external OpenAPI document that may not be available.

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?

With a single body parameter and 100% schema description coverage, the schema already documents the parameter. The description's only contribution is pointing at components.schemas.GameCenterLeaderboardImageV2CreateRequest, which the schema's own description already states, so it adds no meaning beyond the structured field. 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 is essentially the HTTP method and path restated ('POST /v2/gameCenterLeaderboardImages'), which duplicates what the tool name already conveys. It does not describe in natural language what is created or how it differs from the many sibling create tools (e.g. game_center_leaderboard_images_create_instance v1 vs this v2 variant). This is a tautological restatement rather than a specific verb+resource statement.

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?

There is no when-to-use guidance, no prerequisites, and no indication of when to prefer the v2 create over the v1 create or the update/delete siblings. The description offers nothing about the conditions that select this tool.

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