vehicle.manufacturers

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

The description states it is a 'paginated list,' which implies a read-only, batch retrieval operation. However, with no annotations provided, the description does not disclose any additional behavioral traits such as rate limits, data freshness, or response structure. It is adequate for a simple list but could be more informative.

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 description is a single, front-loaded sentence that efficiently conveys the tool's core purpose. It is concise with no wasted words, though it could be slightly expanded to include key behavioral details without harming conciseness.

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?

Given the tool's simplicity (one optional parameter, no output schema), the description adequately covers its purpose. However, it lacks details about the response structure, any limits on the list, or how pagination works. For a straightforward list, this is acceptable but not fully 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?

The schema shows one optional 'page' parameter with a default of 1, but the schema description coverage is 0% (the description field in the schema is just 'Manufacturers'). The tool description does not explain the purpose of the page parameter or its expected values, leaving the agent to infer from the schema alone.

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 clearly states the tool returns a 'Paginated list of all NHTSA-registered vehicle manufacturers (vPIC).' It uses a specific verb ('list') and resource ('manufacturers'), and the context of NHTSA and vPIC distinguishes it from sibling tools like vehicle.models or vehicle.vin-decode.

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 explicit guidance on when to use this tool versus alternatives. The description implies use for listing all manufacturers but does not mention when to choose it over other vehicle-related tools, nor does it provide any conditions or exclusions.

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