game_center_leaderboard_entry_submissions_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 and discloses nothing: not that it creates a leaderboard entry submission on behalf of a player, not the auth/permission requirements, not the side effects or idempotency. It also repeats itself verbatim ('POST /v1/... (POST /v1/...)') without adding information. This is a bare endpoint stub.

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, but the parenthetical duplicates the URL already written at the start, wasting the only space available. Low information density with a redundant clause is the opposite of earning every sentence.

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 create/mutation tool with no annotations, no output schema, and an external schema reference the agent cannot read inline, the description is wholly inadequate. It omits what is created, required permissions, the JSON:API envelope contents, and any failure behavior.

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%, and the schema already states 'Shape: components.schemas.GameCenterLeaderboardEntrySubmissionCreateRequest.' The description merely repeats that same pointer, adding no field-level meaning, so the 3 baseline for a fully documented single parameter is appropriate.

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 only restates the HTTP route 'POST /v1/gameCenterLeaderboardEntrySubmissions' and never says in prose what the tool does. The verb+resource meaning lives entirely in the tool name, so the description is effectively a tautology rather than an explanation. An agent gets no more than it already infers from 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 when-to-use guidance, no prerequisites, and no mention of any alternative among the hundreds of sibling tools (e.g. game_center_player_achievement_submissions_create_instance or score moderation tools). Nothing routes the agent to this tool versus its neighbors.

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