game_center_groups_get_collection

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 delivers nothing. It does not mention pagination (relevant given the 'limit' param), authentication/permission requirements, or that this is a read-only listing. For a 19-parameter read endpoint with zero annotation coverage, this is a total 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 structurally useless: the same path string appears twice with no added information, and there is no front-loaded statement of purpose. Brevity here reflects under-specification rather than conciseness.

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 complex 19-parameter collection endpoint with no output schema and no annotations, the description is completely inadequate. It omits what a Game Center group is, how the include/fields/filter parameters interact, and what the response contains, leaving the agent with no context beyond the URL.

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 every one of the 19 parameters (limit, include, fields_*, limit_*, filter_*) is documented in the schema itself. Per the rubric, a high-coverage schema establishes a baseline of 3 even when the description adds no parameter information; here the description adds none at all.

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 the raw endpoint path 'GET /v1/gameCenterGroups' repeated verbatim in parentheses. It identifies the resource (gameCenterGroups) and the HTTP verb (GET = list), but states nothing in natural language about what the tool returns or how it differs from siblings like game_center_groups_get_instance. This is essentially a restatement of the name, not a purpose 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?

No guidance whatsoever on when to use this collection endpoint versus the instance endpoint or any of the many relationship endpoints under game_center_groups_*. There are no alternatives named and no conditions given; the agent must infer everything from the tool name alone.

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