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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the safety profile is covered. The description usefully adds the batch cap (1-25), the accepted identifier formats, and the result ordering ('Riskiest first'), which the annotations do not convey. It does not mention auth needs or behavior on invalid/missing carriers.

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 dense sentence front-loads the purpose and identifier formats, then lists the returned evidence, closing with the ordering rule. No filler or repetition of the title.

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 no output schema, the description correctly enumerates the returned field groups and their ordering, which is what an agent needs to consume the result. It stops short of describing failure handling for unparseable or unknown carrier numbers, a minor gap for a single-parameter read 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?

Schema coverage is 100% and descriptions already give example formats, so the baseline is 3. The description adds value by naming additional accepted identifier types (MC/MX/FF dockets, not just USDOT/MC) and by restating the 1-25 range, slightly tightening the agent's input expectations.

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 gives a specific verb ('Verdict') and resource (US motor carriers) and then enumerates exactly what is assessed: USDOT status/age, authority, insurance, OOS orders, inspections and crashes. An agent can tell this apart from carrier_alerts and new_carriers without opening the schema.

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 implied by the vetting framing and the explicit '1-25 carriers' batch scope, but there is no statement of when to prefer this over the sibling tools or what prerequisites (e.g., valid registration numbers) apply. Adequate but leaves the alternative selection to inference.

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