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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety profile is covered. The description adds two genuinely useful facts beyond them: the result is partitioned into required and nice-to-have, and the call is free (no credit spend, relevant since get_credit_balance is a sibling). It says nothing about length limits, failure modes, or how job_id vs job_text resolution behaves.

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?

It is compact and free of padding, and the 'Free' note is a nice front-loaded qualifier at the end. But it opens with 'The skills...' rather than an action verb, so it reads as a fragment of a spec rather than an instruction, costing clarity for no saved length.

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?

For a read-only extraction tool with no output schema, the description does tell the agent the shape of the result (required vs nice-to-have categories), which is more than nothing. Still missing: the input contract for two undocumented parameters, the 30,000-character text limit, and any routing guidance against check_cv_keywords.

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% and neither parameter is mentioned in the description. With two parameters (job_id, job_text), zero required fields, and no explanation of which to supply or what happens if both or neither are given, the description leaves the caller to guess at the calling contract.

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 identifies the resource precisely (skills, tools and hard requirements in a job ad, split into required vs nice-to-have), but it is a noun phrase with no verb — the agent must infer 'extracts' from the title. It also does not distinguish this tool from sibling check_cv_keywords, which operates on the same keyword concept.

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 when-to-use guidance, no prerequisites, and no reference to alternatives. The agent is never told whether to call this before or instead of check_cv_keywords, tailor_application, or find_job_matches — a significant gap given dense sibling overlap around job/CV keyword work.

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