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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds the useful fact that the payload is the complete job posting rather than a summary, but says nothing about not-found behavior or whether the slug is opaque or human-readable.

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 economical fragment with no filler, and the most important content (it returns the full job posting) comes first. It is a noun phrase rather than a statement of action, which slightly reduces front-loading of the tool's purpose.

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 must carry the return-value burden, and it does sketch the payload's main sections. However, for a tool whose slug must presumably be obtained elsewhere, the absence of any linkage to search_jobs or error-handling note leaves a modest gap.

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% for the single parameter ('Job slug'), so the schema already documents it. The description contributes no additional meaning about slug format, source, or case sensitivity, leaving the baseline of 3 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 enumerates what the returned job record contains (description, eligibility, compensation, application process) but never states the action or resource in verb form; the reader infers 'fetch a job posting' from the name alone. It also gives no signal to distinguish it from the sibling search_jobs, which covers a similar domain.

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?

There is no when-to-use guidance, no statement of prerequisites (e.g. that a slug must come from search_jobs), and no naming of alternatives such as search_jobs for discovery versus get_job for retrieval of a single posting.

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