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

Annotations already declare read-only, idempotent, non-destructive behavior, but the description adds the required financials:read scope and current unavailability, which are important authorization-related traits beyond the annotations. It does repeat risk/effects and does not explain what happens if called while unavailable, but the auth context is valuable.

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 output content is front-loaded and the second sentence compactly conveys scope, risk, effect, and availability. There is slight redundancy because 'Risco: read' and 'Efeitos: Nenhum' repeat what the annotations already provide.

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, the description helpfully enumerates the returned metrics, which gives the agent a good sense of what the report contains. It also discloses authorization scope and availability, though it does not detail response shape or granularity beyond the listed metrics.

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 100%, and the two date parameters already document their format and defaults. The description only implies a period via 'do período' and adds no parameter-specific syntax or behavioral detail 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 enumerates the cash-flow outputs: inflows, outflows, daily and accumulated period balance, and receipts by payment method. It is specific about the resource, but it does not differentiate this report from sibling financial tools such as list_payments or get_commissions.

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?

It states that the tool is currently unavailable under this authorization, which is a useful exclusion, but it gives no guidance on when to use this tool versus alternatives like list_payments, get_commissions, or get_performance_report. The agent must infer the appropriate use case.

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