wta_player_matches

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

Annotations already declare readOnlyHint, openWorldHint, and idempotentHint. The description adds 'Auth: none needed,' a concrete example call, and the exact return structure, which are useful behavioral details beyond the annotation metadata without contradicting it.

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 description is front-loaded with the core purpose, but it is redundant: the first line presents the return structure, then the 'Returns:' section repeats it with additional fields. The example and auth note are useful, but the redundancy makes it less concise than ideal.

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?

With no output schema, the description provides the return structure, an example, and auth requirements, covering the essential information. It does not mention ordering, pagination, or not-found behavior, but for a simple single-param read-only tool with strong annotations, it is largely complete.

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?

The input schema provides 100% coverage for playerId, including its source (wta_players[].id) and URL path relevance. The description's example ({"playerId": 320760}) adds a concrete illustration but does not introduce new semantic meaning beyond what the schema already documents.

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 clearly states 'One player's match history' and 'The per-tournament results/log for a player,' specifying both the resource and scope. It distinguishes this tool from siblings like wta_player (likely profile) and wta_tournament_matches (tournament-centric) by focusing on a single player's matches.

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 description implies the tool is for retrieving a player's match history, which gives context for when to use it, but it does not explicitly mention alternatives or exclusions. No guidance on when not to use it versus wta_player or other related tools is provided.

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