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

No annotations are present, so the description carries the full burden of behavioral disclosure. It implies a read-only retrieval operation but reveals nothing about result count, ordering, what 'most relevant' means operationally, or whether the endpoint could return empty or error results.

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 17-word sentence that efficiently conveys the core purpose. The phrase 'by asking the who endpoint' is slightly redundant with the tool name, but the description is otherwise free of filler and well structured.

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 tool with no output schema, the description conveys the essential input and rough output. However, with two ambiguous siblings and no annotation support, an agent would likely need to probe the tool to understand what it returns and when to prefer it over ask or list_sites.

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 100%, so the baseline of 3 applies. The description's mention of 'a query' loosely maps to the query parameter but adds no format, length, or syntax guidance beyond what the schema already provides.

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?

States a specific verb (Find) and resource (most relevant sites) with a clear query-driven purpose. However, 'by asking the who endpoint' is mildly circular since 'who' is the tool name itself, and it doesn't explicitly distinguish the tool from its sibling list_sites, which also deals with sites.

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?

Provides no when-to-use or when-not-to-use guidance. With siblings named ask and list_sites, there is no hint about how 'finding relevant sites for a query' differs from asking something or listing sites, leaving the selection decision entirely to the agent.

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