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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds that it generates a report for a period, but does not disclose return format, pagination, or any constraints, which is acceptable given the low risk read-only nature.

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?

A single, front-loaded sentence that efficiently conveys the tool's purpose without filler. It is appropriately concise.

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?

Though the tool is simple and read-only, the description does not explicitly state what the tool returns; the output schema is absent. However, the phrase 'gera o DRE' implies the DRE is the return value, and with schema coverage and annotations, it is minimally 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?

Schema descriptions cover all three parameters (dataInicio, dataFim, empresaId) with clear formats and IDs. The description only mentions 'período', which maps to the date range, adding no extra meaning beyond the schema.

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 generates a company's income statement (DRE) for a given period, using the specific verb 'Gera' and naming the resource. It is distinctive among siblings, which include other consultar_* tools but none for DRE.

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 when a DRE report is needed for a period, but it does not provide when-to-use vs alternatives or exclusions. No sibling with similar functionality is named, so guidance is minimal.

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