get_player_matches

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states what is retrieved; it does not mention whether matches are live or finished, how results are structured, whether pagination applies, or any required permissions or rate-limit considerations.

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 a single, focused sentence with no filler. The verb and object are front-loaded, and the length is appropriate for a tool with one simple parameter.

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 and no annotations, the description needs to clarify return scope and edge cases. The phrase 'involving a player' is ambiguous about whether these are matches the player's team played, matches the player personally participated in, or both. Additional context about the data returned is missing.

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 0%, and the description does not explicitly explain the username parameter, its format, or its role beyond the word 'player'. The parameter property name itself, 'username', is self-explanatory, but the description adds minimal semantic value over the raw schema.

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 uses a concrete verb ('Get') and names a specific resource ('team matches involving a player'). It communicates the core purpose clearly, though it does not explicitly differentiate itself from closely related siblings like get_team_match or get_club_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 usage: use this when you need team match data scoped to a player. However, it gives no explicit when-not-to-use guidance or alternatives, leaving the agent to infer how this differs from get_team_match, get_player_games, and get_club_matches.

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