download_player_games_pgn

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

With no annotations, the description must disclose behavioral traits. It only states 'Download PGN files' but does not mention file size, rate limits, whether multiple files are bundled, or if the download is synchronous. The read-only nature is implied but not explicitly stated.

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 sentence, which is concise, but it omits essential information. While brevity is valued, it sacrifices completeness, making it under-specified rather than well-structured.

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?

Given the low complexity and existence of an output schema, the description still falls short. It does not explain the output format (PGN bundle or single file), nor does it provide context about the tool's place among siblings. The description is minimally adequate but not fully informative.

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%, meaning no parameter descriptions in the schema. The tool description does not add any meaning beyond the parameter names (username, year, month). It fails to explain expected formats, ranges, or constraints (e.g., month 1-12, year range).

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 the action 'Download PGN files' and the resource 'all games in a specific month from Chess.com'. It distinguishes from siblings like get_player_games_by_month by specifying the PGN format, but could be more explicit about how it differs from other game retrieval tools.

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?

No guidance is provided on when to use this tool versus alternatives like get_player_games_by_month or get_player_game_archives. The description does not indicate prerequisites, limitations, or context for use, leaving the agent without decision-making support.

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