game_center_groups_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 discloses only that this is a POST (a write), and says nothing about required permissions, whether creation is idempotent, side effects, or what a successful response looks like. For a mutation tool 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?

It is short and front-loads the endpoint, but the path is duplicated verbatim inside the parentheses ('POST /v1/gameCenterGroups (POST /v1/gameCenterGroups)'), which is pure waste. Every remaining token merely points to a schema component.

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 mutation tool that accepts a nested JSON:API envelope with no output schema and no annotations, the description is inadequate. It should at least summarize what the GameCenterGroupCreateRequest contains or note auth expectations, but instead defers entirely to an external schema reference.

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% and there is a single body parameter, so baseline is 3. The description only repeats the schema's own pointer to components.schemas.GameCenterGroupCreateRequest and adds no syntax, required-field, or envelope detail beyond what the schema already states.

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 pairs the raw HTTP mapping (POST /v1/gameCenterGroups) with the tool name, so an agent can infer it creates a gameCenterGroups resource. However, it never states the purpose in prose or distinguishes the create operation from the many sibling game_center_groups_get/update/delete/relationship tools beyond the embedded verb. It is essentially a restatement of the endpoint rather than a description of what the tool accomplishes.

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 guidance on when to use this tool versus alternatives such as game_center_groups_get_collection or game_center_groups_update_instance, and no preconditions are stated. The only usage signal is the implicit 'POST means create' left for the agent to infer.

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