game_center_achievement_localizations_update_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 and delivers almost nothing: it confirms a PATCH mutation and deprecated status but says nothing about permissions, what fields are affected, side effects, or reversibility. For an unannotated write tool this is a substantial 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 single line repeats the identical endpoint text twice (path with and without the space form), which is pure redundancy, and the deprecation marker plus path-only phrasing leaves the useful content minimal relative to the noise.

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 deprecated, unannotated mutation tool that takes a free-form nested JSON:API body and has no output schema, the description is far too thin. It neither explains the update semantics nor warns an agent about the mutation beyond the deprecation tag.

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 baseline is 3. The description's only added value is pointing at components.schemas.GameCenterAchievementLocalizationUpdateRequest for the body envelope, which is a helpful pointer but not meaningfully more than 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 names the resource (GameCenterAchievementLocalizations) and the operation (PATCH/update), so an agent can infer it mutates a localization record. However it does so only via a raw REST path rather than natural language, and it does not distinguish this deprecated endpoint from the non-deprecated and _v2_update_instance siblings that also exist.

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] tag is a weak form of 'when not to use', but the description never states which tool an agent should use instead, nor any prerequisites or context for when updating a localization is appropriate. No explicit alternatives are named despite several closely-related siblings.

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