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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds that the output is a 'normalised taxonomy label' (RChilli taxonomy) and that input must be escaped plain text, but says nothing about what happens to unmatched skills or about taxonomy coverage limits. Note the stale 'userkey' arg, which no longer exists in the schema.

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?

The opening sentence is well front-loaded and wastes nothing. The trailing 'Args:' docstring block is boilerplate that partly duplicates the schema and contains an argument the schema does not define, so it does not earn its space.

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 a single well-documented parameter, full annotation coverage, and an output schema handling the return value, the description covers what an agent needs to make the call. Only the stale userkey reference and lack of sibling disambiguation keep it below complete.

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% and resume_data is fully documented in the schema, so the baseline is 3. The description restates the same idea ('Resume as an escaped plain text string') and adds a format hint, but also lists a 'userkey' parameter that is not present in the input schema, which risks the agent passing a nonexistent argument.

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 first sentence gives a specific verb and resource ('Map every skill mentioned in a resume to a normalised taxonomy label'), so the agent knows exactly what transformation happens. It does not distinguish itself from nearby siblings such as map_job_to_skills or lookup_skill, which is the only thing keeping it from a 5.

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 by the phrase 'in a resume'; there is no explicit when-to-use, when-not-to-use, or prerequisite statement. With siblings like map_job_to_skills, autocomplete_skill, and lookup_skill in the catalog, the description should say which one applies to which input.

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