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

Beyond the annotations, it adds meaningful operational context: platform-hosted, no platform credentials, pay-per-query with prepaid credit, data available to citizens, and client data-controller responsibilities under LGPD. It does not describe the return payload, but the read-only annotation already signals safety.

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 purpose is front-loaded in the first sentence, and the remaining sentences add useful operational and legal context. It is compact and readable, though some legal/boilerplate phrasing could be tightened.

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?

There is no output schema, and the description does not explain what the tool returns, likely error conditions, or rate/usage limits. While the high-level purpose and context are present, parameter semantics and response expectations are missing, leaving the agent under-informed for invocation.

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 has three required parameters with zero description coverage, and the description does not explain renavam, pkcs12_cert, or pkcs12_pass. The description fails to compensate for the lack of parameter documentation.

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 identifies the tool as a DETRAN PR vehicle extract query against an official source. It is specific about the resource (Veículo/Extrato) and action (consulta), and it distinguishes itself from the unrelated sibling 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?

The description provides useful context: official Brazilian source, non-confidential data, prepaid per-query model, and LGPD compliance. However, it does not explicitly state when to use this tool versus alternatives or when not to use it.

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