game_center_activity_versions_create_instance

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

With no annotations, the description carries the full behavioral burden but discloses nothing: no auth/permission requirements, no side effects, no info on what gets created or whether the operation is reversible. The only useful token is the pointer to the OpenAPI request schema.

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 it wastes its only sentence by repeating the endpoint path verbatim twice. The remaining clause is a schema pointer rather than actionable content, so it is concise without being informative.

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 (mutation) tool with a nested object body, no output schema, and no annotations, the description is far too thin. It does not describe the resource being created, required relationships, or expected outcome; the schema reference is the sole aid.

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?

There is a single 'body' parameter with 100% schema coverage, and both the description and the schema point to components.schemas.GameCenterActivityVersionCreateRequest. The description adds the phrase 'full JSON:API envelope', a marginal clarification of the body format, so it meets the baseline-3 expectation when the schema already documents the parameter.

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 a restatement of the tool name: 'POST /v1/gameCenterActivityVersions' conveys only an HTTP method and path, which the name already encodes via 'create_instance'. It never explains what a Game Center activity version is or differentiates this create operation from the many sibling create_instance tools. This is tautological rather than semantic.

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 mention of alternatives (e.g. update_instance or the relationship endpoints for versions). The agent gets no routing information whatsoever.

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