get_chess_player_profile

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

Without annotations, the description carries the burden of disclosure. It states the tool gets a 'public profile', implying no authentication, but does not mention rate limits, error handling (e.g., invalid player name), or the nature of the profile data. The behavioral expectations are minimally conveyed.

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 that directly states the tool's purpose with no extraneous words. It is front-loaded with the verb. However, it could be expanded to include critical usage details without losing conciseness.

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?

The output schema exists, so return values are covered. However, the description lacks context about input constraints, expected player name format, and whether the player must exist. For a simple lookup tool with one parameter, this is somewhat adequate but still incomplete.

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%, so the description must add meaning to the parameter. It only repeats the parameter name 'player_name' in context—'by player_name'—without explaining format, case sensitivity, or examples. This provides no value beyond the schema's property name.

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 verb 'Get' and the resource 'public profile for a Chess.com player', distinguishing it from the sibling tool 'get_chess_player_stats' which presumably returns stats rather than profile data. The phrase 'by player_name' indicates the required parameter.

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, what prerequisites are needed, or any conditions under which it should not be used. The agent must infer usage solely from the name and the sibling tool.

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