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 goes further by disclosing exactly what data comes back, which is valuable because there is no output schema; it does not, however, describe behavior for an unknown/expired job slug or any auth requirements.

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?

One dense sentence with no filler, front-loaded on the object of the call (a single role) and then the payload. The run-on list is efficient though slightly unpacked, keeping it just short of a 5.

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 usefully enumerates the returned fields, which is exactly what an agent needs to decide whether to call it. It is a read-only, single-parameter getter, so gaps around error behavior and rate limits are minor.

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?

There is a single parameter with 100% schema description coverage, and the schema already explains that it accepts a slug from search_jobs or a justbacked.com/jobs URL. The description adds nothing about the parameter, so baseline 3 applies.

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 (full detail for one role/job) and enumerates the exact payload: description, pay, funding round and investors, hiring velocity, apply URL, ATS, and tracker status. This clearly separates it from list-oriented siblings like search_jobs and from get_company's company-level scope.

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?

Usage is only implied: the returned fields (apply URL, tracker status) suggest it is the drill-down after search_jobs, but the description never names search_jobs or get_company as alternatives, nor states when this is preferred over them. No explicit when-to-use or when-not-to-use guidance is given.

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