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

The description says 'the request is still registered and a quote_id returned,' which implies creating a persistent record/ID, while annotations declare readOnlyHint=true. This is an annotation contradiction; the tool cannot be read-only if it registers requests and returns a new quote_id.

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?

Four focused sentences, each earning its place: main purpose, PII exclusion, unlicensed fallback, and server behavior. Information is front-loaded and there is no redundant phrasing.

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?

Covers the main output, licensing edge case, and error/request behavior, which is strong for a 10-parameter tool with no output schema. It still leaves the license-status success response format somewhat implicit, but the essential call and fallback semantics are present.

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 only 20%, so the description must compensate. It usefully clarifies that only rating facts are needed and enumerates excluded PII, but it does not explain the optional fields (annual_mileage, violations_3yr, prior_continuous, etc.) or their roles, so the gap is only partially filled.

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 ('Return'), a concrete resource ('indicative auto insurance prices'), and scope ('from multiple carriers, where this entity is licensed to show them'). This clearly distinguishes it from eligibility or agency-status tools.

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?

Conveys when to use it: when an indicative price is needed and only rating facts are available. It also explains the unlicensed-carrier fallback, but it does not explicitly name alternatives or state when not to use it, leaving some inference to the agent.

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