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

With no annotations, the description must carry the behavioral disclosure burden. It only says buckets are 'named for the domain', without clarifying whether the tool enumerates publicly indexed buckets, checks permissions, performs network requests, or merely resolves naming patterns.

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, front-loaded sentence with no filler. It is appropriately brief for a simple single-parameter tool, though slightly too terse because it omits the explicit parameter-to-domain mapping.

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?

Given zero annotations, 0% schema coverage, and only a short description, the tool is under-specified for an agent to confidently call it. The agent must infer that 'q' takes a domain and that the result is a list of related bucket names; the description does not explicitly confirm either.

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 compensate for the undocumented 'q' parameter. The phrase 'named for the domain' implies q is a domain, but it never explicitly states what the parameter expects or in what format (e.g., bare domain, URL, with or without scheme).

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 identifies a specific resource (S3/GCS/Azure buckets) and the association with a domain, which sets it apart from generic siblings like 'cloud' and 'dirlisting'. However, it lacks an explicit verb such as 'list' or 'enumerate', so the action is implied rather than stated.

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 given for when to use this tool versus alternatives. It does not mention exclusions, prerequisites, or any sibling tools that might be more appropriate for related bucket/cloud investigations.

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