game_center_achievement_localizations_v2_create_instance

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

No annotations are provided, so the description carries full behavioral burden, yet it discloses nothing beyond the HTTP endpoint. It does not state that this is a mutating create, what side effects or validation rules apply, what permissions are required, or what happens on conflict with an existing localization.

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?

Very short, but the parenthetical repeats the same path verbatim ('POST /v2/gameCenterAchievementLocalizations (POST /v2/gameCenterAchievementLocalizations)'), which is pure redundancy. The remaining sentence is efficient but low-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 mutation tool with a nested JSON:API body, no annotations, and no output schema, the description is far too thin. It points to an external OpenAPI schema for the request shape but does not surface any of the information an agent needs to call the tool correctly, nor does it explain what is returned.

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%: the single 'body' parameter is documented in the schema as referencing components.schemas.GameCenterAchievementLocalizationV2CreateRequest, and the description repeats that pointer. No additional syntax, required fields, or envelope structure are explained beyond the schema reference, so the baseline of 3 applies.

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 effectively restates the tool name and HTTP path ('POST /v2/gameCenterAchievementLocalizations') rather than explaining the domain operation. An agent can infer 'create' from the POST verb, but nothing distinguishes this v2 create from the v1 sibling game_center_achievement_localizations_create_instance, nor clarifies what a localization instance represents.

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 when-to-use guidance, no prerequisites, no mention of alternatives such as the v1 create tool or the update/delete siblings. The agent is given no basis for choosing this tool over the ~40 other game-center localization tools.

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