game_center_activity_localizations_get_instance

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

With no annotations provided, the description carries the full burden but discloses nothing about authentication, caching, error behavior, or what happens for a missing id. It is a bare endpoint path.

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 is short but that reflects under-specification rather than discipline. The pointless duplication of the same path in parentheses is wasted characters, and nothing is front-loaded with actual purpose information.

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 five-parameter GET with no annotations, no output schema, and a family of related sibling tools, the description omits what the resource represents, what is returned, and how the include/fields filters behave — wholly inadequate.

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%, so the schema already documents id, include, and all fields_* filter parameters. The description adds no meaning beyond the {id} path placeholder, which the schema covers.

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 just a duplicated REST endpoint path ('GET /v1/gameCenterActivityLocalizations/{id}') repeated twice. It conveys retrieval-by-id through the HTTP verb convention but never states in plain terms what a game center activity localization is or what the tool returns, making it essentially a restatement of the name.

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 the many siblings (update_instance, delete_instance, image_get_to_one_relationship, etc.). The agent must infer usage purely from the endpoint name and method.

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