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

Annotations already declare readOnly=true, destructive=false, and closed-world, so the safety profile is covered; the description adds what the call actually yields (focus areas with titles plus untagged titles). It does not say what happens with an unknown or malformed slug, which is a minor behavioral gap.

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?

Three short sentences, all front-loaded with the core action before the discovery hint and the ordering guidance. No filler or repetition.

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 output schema, the description does the work of explaining the return payload (focus areas, their titles, untagged titles) and the prerequisite lookup path. Only error/empty-result behavior for an invalid slug is left unstated.

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% with a single string parameter and examples already listed in the schema. The description's "REQUIRED arguments: jobFamilySlug" restates the schema rather than adding meaning beyond "by its slug".

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?

"Look up a job family by its slug and get its focus areas (specializations) with their titles, plus untagged titles" gives a specific verb, resource, and scope of returned content. It is clearly separable from the sibling search-job-families tool, which the description names 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?

It states a concrete downstream use case ("to find focusTagSlugs for the benchmark tools") and routes the agent to search-job-families when only a name is known. Both the when-to-use and the alternative are spelled out.

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