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

Annotations already indicate read-only, idempotent, and non-destructive behavior. The description adds useful behavioral context: cost per query, data from official Brazilian sources (not confidential), and LGPD compliance, which go beyond the annotations.

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 subsequent sentences add relevant context (hosting, payment, data nature, legal). It is not overly verbose, though the LGPD disclaimer is somewhat tangential to tool invocation.

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 and no parameter descriptions, the tool is complex enough to require more detail. The description does not explain authentication requirements, the role of each parameter, or the response format, making it incomplete for an agent to invoke correctly.

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 0% and the description does not mention any of the six parameters (login_cpf, login_senha, chassi, renavam, pkcs12_cert, pkcs12_pass). No explanation of what these parameters are for, leaving the agent with no guidance on how to construct a valid request.

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 query for vehicle debts from DETRAN BA, using specific verb 'consulta' (query) and resource 'Débitos' (debts). It distinguishes from sibling tools which are platform utilities, not data lookups.

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?

Provides context such as official source, prepaid credit, and LGPD responsibility, but does not explicitly state when to use it versus alternatives. Since no sibling tools are similar, explicit exclusion may be less critical, but the description still lacks clear when-to-use guidance.

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