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

With no annotations, the description carries the burden of behavior disclosure. It usefully reveals that only public pools are accessible and private/club pools will not work, but it does not describe the returned leaderboard structure, ordering, or any access prerequisites. This is adequate but leaves gaps.

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 two short sentences with no filler. The core purpose is front-loaded, and the availability restriction earns its place as a separate clarifying sentence.

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 one-parameter read-only query, the schema fully documents the required input and the description communicates the public-only scope. However, because there is no output schema or annotations, a little more detail about what the leaderboard contains or how it is ordered would make it fully 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 already provides 100% coverage for the sole parameter, explaining that share_token comes from a /pool/<token> URL. The description only restates 'by its share token' and adds no new semantic detail, so the baseline score of 3 is appropriate.

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 identifies the resource—a leaderboard of a public community pool—and the identifying key, its share token. It also sets scope by excluding private and club pools, but it does not explicitly contrast itself with the sibling tools current_tournament and how_4grand_works.

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 about when to use this tool versus the sibling tools. The phrase 'Private and club pools are not available' states a limitation, but it does not tell an agent when to prefer this tool or when to use an alternative.

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