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

Annotations already indicate readOnly, idempotent, and not destructive. The description adds behavioral details: returns all records in date range (default last 30 days), includes record fields, and date format. No contradictions, and it enriches the agent's understanding of the tool's behavior.

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 moderately concise but includes extraneous text like '[Flattened action: categories]' which is unclear. It front-loads the purpose but could be streamlined. Each sentence contributes value, but the structure could be tighter.

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?

Given the simple input schema and absence of output schema, the description provides adequate context: it explains the tool's purpose, actions, record fields, and date format. It covers the essentials for agent usage, though it misses the 'account' parameter and does not mention pagination or limits.

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?

With schema description coverage at 0%, the description compensates somewhat by explaining 'inicio/fim' format and default behavior, and partially describing 'tipo' (entrada/saida with translations). However, 'account' is not explained, and 'inicio'/'fim' defaults are not explicitly documented in the schema. The description adds meaning but leaves gaps.

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 it reads financial records and lists two actions (list, categories). It specifies the verb 'Read' and the resource 'financial records'. However, the tool name includes 'categories', while the description broadens the purpose to general reading, which could cause confusion. It does not explicitly differentiate from sibling tool 'webdiet_financeiro_list'.

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 explains the two actions (list and categories) and the default date range, but it provides no guidance on when to use this tool versus alternatives like webdiet_financeiro_list. It lacks explicit when-to-use and when-not-to-use scenarios.

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