game_center_activity_version_releases_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. It does disclose the deprecation status, which is valuable, but says nothing about permissions required, whether the body is validated, what side effects occur, or whether the operation is reversible. For a mutation endpoint with zero annotation coverage this is a significant 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 text repeats the path verbatim in parentheses immediately after already stating it, which is pure waste, and the 'Body shape: see OpenAPI...' phrasing is stilted. The deprecation tag is correctly front-loaded, but the rest is not efficiently written.

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 create operation with a nested JSON:API body, no annotations, and no output schema. The description offloads essentially all substance to an external OpenAPI document and provides no return-value or error context. Given the complexity of the request envelope, an agent is left under-informed beyond the deprecation warning.

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 coverage is 100% and the single body parameter is described in the schema, so baseline is 3. The description points the agent at components.schemas.GameCenterActivityVersionReleaseCreateRequest for the JSON:API envelope, which adds a useful pointer beyond the schema, but gives no field-level meaning or required-field hints.

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 states the HTTP method and path, and the tool name implies creating a game center activity version release. However, it never states the purpose in plain language ('creates a release record for an activity version') and merely restates the endpoint. An agent can infer the operation but gets no domain-level explanation of what a release is or why it matters.

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] tag signals an agent should probably avoid this tool, which is genuinely useful routing information. But there is no explicit when-to-use, no statement of what replaces it, and no reference to the sibling get_instance/delete_instance tools. The guidance is a hint rather than a directive.

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