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

The description adds some behavioral context (public, versioned, trusted-runner-verified) beyond the annotations, but the annotations already clearly indicate read-only, idempotent, and non-destructive behavior. There is no contradiction.

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 14-word sentence that immediately conveys the tool's purpose. It is front-loaded with the key action and resource, and contains no extraneous 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?

With no parameters and no output schema, the description covers the essential purpose. Annotations handle safety. However, it doesn't mention pagination, ordering, or whether the list is exhaustive, which might be needed for full completeness.

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?

There are no parameters (0), and schema description coverage is 100% (empty). The description does not need to explain parameters; baseline for 0 parameters is 4. It adds clarity on what is listed but not on filtering or sorting.

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 specifies the verb 'List' and the resource 'public, versioned benchmark contracts' with a clear scope 'only their trusted-runner-verified submissions'. It fully distinguishes from sibling tools 'get_agent' and 'search_agents' which deal with agents, not benchmarks.

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?

The description implies usage for listing benchmarks but does not provide explicit guidance on when to use this tool versus alternatives, nor does it mention when not to use it. No exclusions or alternatives are given.

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