nhtsa_safety_rating_detail

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

Annotations declare readOnlyHint=true, so the read-only nature is already known. The description adds useful context about what is returned – 'crash test ratings, rollover risk, and safety technology assessments' – which goes beyond the annotation. No contradictory or hidden behaviors are disclosed, but no extra caveats (e.g., data availability) are mentioned.

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?

Three concise, front-loaded sentences: purpose, prerequisite, and return contents. No redundant phrasing or wasted words; every sentence adds 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?

For a simple read-only detail tool with one parameter and no output schema, the description adequately covers the return categories. It explains what the tool does and how to get the required ID, but could be slightly more specific about the format or level of detail (e.g., how ratings are presented), though not essential.

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 coverage is 100% and the parameter description already states 'VehicleId from safety ratings search (e.g. 19950)'. The tool description repeats the same source ('Requires a VehicleId from nhtsa_safety_ratings search results') without adding new semantic detail, so it meets the baseline but does not elevate it.

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?

Description opens with 'Get detailed NHTSA 5-star safety ratings for a specific vehicle variant' – a specific verb, resource, and scope. It distinguishes from sibling nhtsa_safety_ratings by emphasizing 'detailed' and 'specific vehicle variant', and it names the prerequisite search tool.

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?

Explicitly states 'Requires a VehicleId from nhtsa_safety_ratings search results', establishing when to use this tool (after a search has returned a VehicleId). It does not explicitly exclude alternatives, but the prerequisite clearly points to the correct preceding workflow, making usage context unambiguous.

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