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

Beyond the readOnly/idempotent annotations, the description discloses the prepaid billing model, lack of platform credentials, official/public data source, and LGPD controller responsibility. It does not cover output details or failure modes, but the annotations already establish the safety profile.

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 compact and front-loaded, with the core purpose in the first sentence and supporting operational/legal context in the following sentences. It is slightly dense but every sentence adds relevant 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?

It covers the key operational and compliance aspects: payment, credentials, official source, and LGPD responsibility. However, with no output schema and no parameter semantics, the agent still lacks information about the returned CRLV data and input formats.

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 description provides no parameter-level guidance, and the schema has 0% coverage. The parameter names placa, renavam, and documento_proprietario are somewhat self-explanatory, but formats, relationships, and requirements are not explained anywhere.

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 opening phrase 'DETRAN TO: Impressão de CRLV, consulta em fonte oficial' clearly identifies the specific resource and action. It is unmistakably distinct from the generic sibling tools like authenticate, connect, and marketplace.

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 gives clear operational context: use it for CRLV queries from DETRAN TO, no platform credentials needed, and prepaid per-query billing. It does not explicitly state exclusions or alternatives, but no sibling tool competes with this function.

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