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

No annotations are present, so the description carries full burden. The description does not explicitly state that the tool is read-only or safe, but for a simple list operation with no parameters, the lack of detail is acceptable. A score of 3 indicates adequate transparency given the tool's simplicity.

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 sentence that clearly conveys the tool's purpose with no unnecessary words. It is optimally concise 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?

Given no parameters and no output schema, the description is nearly complete. It could mention that it returns a list or is a simple enumeration, but the context provided (harness domains in Loadbay catalog) is sufficient for a straightforward tool. A score of 4 reflects minor room for improvement.

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 tool has no parameters, and schema coverage is 100%. The description adds context that the domains are from the Loadbay catalog, which is helpful. With zero parameters, a baseline of 4 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 precisely states the tool lists harness domains (categories) in the Loadbay catalog. The verb 'list' and resource 'harness domains' are clear, and distinct from sibling tools like get_harness or search_harnesses.

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 or when-not-to-use guidance is provided. The context is implied by the tool's name and description, but alternatives are not discussed. A score of 3 reflects the lack of explicit usage direction.

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