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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering safety. The description adds that payment is required and data is non-confidential, but it does not describe output format, side effects, or failure behavior. It adds some value beyond annotations without contradicting them.

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 concise, front-loaded with the purpose, and each sentence adds context (payment, LGPD, source). It avoids fluff and is appropriately sized for its scope, though it could be slightly more structured to surface key operational details.

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?

For a tool with six parameters and no output schema, the description is notably incomplete. It fails to explain what each parameter means, how the payment model affects invocation, or what the expected return data is. The agent would lack essential information to correctly construct a request.

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 description coverage is 0%, so the description must compensate by explaining parameters. It does not mention any of the required fields (login_senha, tipo_multa, auto_infracao) or optional ones, leaving the agent without any guidance on how to fill them. The description only provides high-level context about the tool's purpose.

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's purpose: consulting second copies (Segunda Via) of ANTT tickets from an official source. It uses a specific verb (consultar) and resource (Boletos), distinguishing it from the generic sibling tools like authenticate and connect.

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 implies usage for official boleto consultation and adds context about payment and LGPD, but it does not explicitly state when to use this tool versus alternatives or provide exclusions. No sibling-specific differentiation is mentioned.

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