game_center_leaderboard_set_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, yet it says nothing about auth requirements, mutation side effects, or rate limits. It does disclose the deprecation and points to the request envelope schema, but that is far short of what a create-instance tool needs to convey.

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?

It is short and front-loads the [DEPRECATED] flag, which is the most important signal. However, it wastes half its length restating the same HTTP path twice instead of using that space for substance.

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 nested-object create tool with no annotations and no output schema, the description omits nearly everything an agent would need: what the resource represents, expected response, and the migration path. Only the deprecation status and a schema pointer are present.

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% for the single body parameter, so the baseline is 3; the description's pointer to components.schemas.GameCenterLeaderboardSetLocalizationCreateRequest is useful orientation but adds no field-level meaning beyond what 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 repeats the POST path twice and names the schema, but never explains what a leaderboard set localization is or how this create differs from siblings like game_center_leaderboard_set_localizations_v2_create_instance. The only distinguishing content is the [DEPRECATED] tag, which is metadata rather than a statement of purpose.

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?

[DEPRECATED] signals the agent should probably avoid this tool, which is a weak usage hint, but the description never names the recommended replacement (the v2 sibling) or states any condition for when this call is still appropriate. No prerequisites or alternatives are given.

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