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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds that the catalog is 'live' and that results are valid slugs, which is useful context about freshness of results, but says nothing about result volume, ordering, or pagination behavior beyond what the schema hints at.

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 sentence with the core action front-loaded and the example slugs providing concrete grounding. Nothing extraneous.

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 an output schema present and annotations covering the read-only/closed-world profile, the description does not need to explain return values, and the slug examples are a bonus. The remaining gap is the undocumented query parameters, which is a modest but real omission for a 2-param tool at 0% schema coverage.

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 carries the burden — yet 'limit' is never mentioned and 'search' is only vaguely gestured at through the word 'Search'. It does not explain matching semantics (substring vs slug-prefix), default page size of 50, or the 100 cap.

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 and resource ('Search the live DOCX.now converter catalog') and even previews the return shape with concrete slug examples (docx-to-pdf, pdf-to-docx). It implicitly separates itself from siblings like get_conversion_status and get_api_usage by being the discovery tool, but never names an alternative explicitly.

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 intended use — finding valid converter slugs — is implied by the return-value examples, so an agent can infer it should call this before a conversion. There is no explicit statement of when to use it versus the sibling tools, nor any exclusion or prerequisite.

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