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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds genuinely new behavioral context: results are 'verified', season-scoped to 2026/27, and returned as ranked 1st/2nd choice per set-piece type — useful given no output schema. It says nothing about freshness or refresh cadence, which keeps it below 5.

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?

A single sentence with the resource and its dimensions front-loaded and no filler wording. Every phrase (verified, 1st/2nd choice, the three set-piece types, season, league) carries information.

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 simple read-only tool with one optional parameter and no output schema, the description conveys enough about the returned content (ranked takers by set-piece category, per club) to call it correctly. Response structure details such as per-club nesting or field names are left unspecified.

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 coverage is 100% and the single optional `club` parameter is fully documented including the omit-to-return-all default. The description adds no parameter meaning beyond that, so the baseline of 3 applies.

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 and resource ('Retrieve ... takers') and scopes it precisely to penalties, corners, and direct free-kicks with 1st/2nd choice ordering for 2026/27 Premier League clubs. It is distinguishable from every sibling (lineups, injuries, props, fixtures), though it does not explicitly name an alternative or non-overlap boundary.

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 explicit when-to-use, when-not-to-use, or alternative is given; the domain implies usage (e.g., FPL or preview prep where set-piece duty matters). The only routing guidance, that omitting the club returns all 20, lives in the schema rather than the description.

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