game_center_leaderboard_localizations_create_instance

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

With no annotations, the description carries the full behavioral burden. It does disclose the deprecation status and that the payload must be a JSON:API envelope, which is useful contextual behavior, but it omits mutation effects, auth/permission requirements, and what existing data is affected.

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 DEPRECATED warning is correctly front-loaded, but the path is duplicated verbatim in parentheses and the remaining content is a pointer to an out-of-band schema. Short, though partly redundant rather than dense with useful 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 mutating create endpoint with no annotations and no output schema, the agent needs to know required fields and effects, yet the description defers entirely to an external OpenAPI document and never explains the JSON:API envelope it mentions. Substantial gaps remain for calling it correctly.

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% for the single 'body' parameter, so the baseline is 3. The description adds no field-level meaning, only pointing to an external OpenAPI schema (components.schemas.GameCenterLeaderboardLocalizationCreateRequest) that the agent cannot read from the tool definition.

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 name plus the 'POST /v1/gameCenterLeaderboardLocalizations' path convey that this creates a leaderboard localization resource, and the [DEPRECATED] tag is a meaningful distinction from the v2 sibling. However the description never states the purpose in words or explains what a leaderboard localization is; it essentially restates the name as an HTTP route.

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] marker hints the tool should be avoided, but the description never names the alternative (e.g. game_center_leaderboard_localizations_v2_create_instance) or states when this legacy endpoint still applies. An agent gets a soft signal but no actionable routing guidance.

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