get_player_games_pgn_by_month

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and openWorldHint=true, covering the safety profile. The description adds 'untrusted external data', which is a useful behavioral warning beyond annotations. However, it does not explain response format, chunking behavior, or handling of invalid inputs.

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, tight sentence with no filler. Every phrase ('bounded character segment', 'monthly PGN text', 'untrusted external data') contributes meaning and is appropriately concise.

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?

Despite good annotations and a clear purpose, the lack of output schema and minimal parameter documentation leaves gaps about return values, error handling, and how offsets work. The description is sufficient for a basic read operation but not fully complete for a tool with 5 parameters.

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 schema has zero parameter descriptions (0% coverage), and the description does not compensate by explaining the meaning of username, year, month, max_chars, or offset_chars. The phrase 'bounded character segment' loosely relates to max_chars/offset_chars but provides no syntax or range details.

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 specific verb ('get') and resource ('bounded character segment of monthly PGN text'), clearly distinguishing it from the sibling get_player_games_by_month by the segmentation aspect. The term 'untrusted external data' adds relevant context without obscuring the core 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?

There is no explicit guidance on when to use this tool versus alternatives like get_player_games_by_month. The phrase 'bounded character segment' hints at pagination or partial retrieval, but the description does not state when this should be preferred or what scenarios call for it.

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