get_country_players

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

With no annotations, the description carries the disclosure burden. It does reveal a behavioral filter ('recently active') and implies a read-only operation, but it leaves the recency window, response format, and possible pagination unspecified.

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 one short, front-loaded sentence with no filler or repetition. It states the action and result directly without wasting the agent's attention.

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 one-parameter read/list tool, the essential purpose is present and understandable. However, with no output schema and no explanation of what 'recently active' means or what the returned player data looks like, it is only minimally 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 schema has 0% parameter description coverage, and the description does not compensate: it only says players are 'associated with a country' without explaining the ISO two-letter country code. The pattern ^[A-Z]{2}$ in the schema does the real work, so the description adds little semantic value beyond the structured constraint.

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 states a specific verb ('Get'), a resource ('recently active players'), and the association with a country on Chess.com, making the core operation clear. It does not explicitly differentiate itself from sibling country tools like get_country_profile or get_country_clubs, so it stays below 5.

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 guidance on when to prefer this tool over the many player/country siblings, no exclusions, and no context about typical use cases. The agent must infer usage entirely from the tool name and the single-line description.

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