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

The description discloses that the tool is hosted by the platform, requires payment via prepaid credits, and that data is not confidential (LGPD compliance). These behavioral traits are not covered by the annotations, so the description adds value in transparency.

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 relatively short but contains repetitive legal and payment disclaimers that could be consolidated. It mixes core functionality with operational details, making it less focused.

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?

The description does not explain what the tool returns (output), nor does it elaborate on the meaning of the 10 input parameters. Given the schema complexity, the description is far from complete.

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 lists 10 parameters with no descriptions, and the tool description does not explain any of them (cpf, cnpj, quota, codigo, etc.). The description adds no meaning to the parameters, leaving them completely unexplained.

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 states it 'Gerar DARF' (generate DARF) and 'consulta em fonte oficial' (query in official source), which gives a general idea but is somewhat ambiguous about the core function. It does not clearly distinguish from sibling tools or specify the exact resource being acted upon.

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 no guidance on when to use this tool versus alternatives. It focuses on payment and legal disclaimers rather than usage scenarios or prerequisites.

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