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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety bar is low. The description still adds real value beyond them by disclosing the response composition (pairs plus a link) and the important caveat that the examples are a sample, not a complete enumeration.

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 sentence that front-loads what is returned and backs it with examples, with the sample-not-exhaustive caveat placed at the end where it belongs. Slightly long but every clause (content, format, examples, link, caveat) carries information.

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?

A no-parameter, non-paginated informational read tool with no output schema — the description fully covers what comes back and flags the incompleteness caveat, which is the main risk. The only gap is not tying the output to the sign-up sibling, a minor omission for a listing tool.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. No parameter text is needed or expected here.

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?

Specific verb ("Lists") plus resource ("task categories") with the exact return shape spelled out as category/example-task pairs. The concrete examples (Pets: Dog Walking, Kids: Camps, Home: Electrician) make the content unambiguous, though it never names the sibling request_sign_up_with_task as the contrasting action.

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: an agent can infer this is a discovery step before signing up, but the description never says when to call it or that the category output feeds request_sign_up_with_task. No exclusions or alternative routing are given.

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