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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description's 'GET' and 'simulando' are consistent with these hints and add the context that this retrieves data, not modifies it. It does not add further behavioral details like output shape or prerequisites, but it does not contradict the annotations.

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 short and not bloated, but it opens with a category breadcrumb ('Receitas / Acordos /') rather than the actionable purpose, and the endpoint largely repeats the tool name. It is compact but not optimally front-loaded.

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 and undocumented parameters, the description needed to explain what query and account mean and what simulated parcel data is returned. It only says 'obtaining data,' which is too vague for an agent to call this correctly without external knowledge.

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% for the two parameters 'query' and 'account', and the description does not mention or explain either one. The agent is left without any semantic guidance for these inputs, so the description completely fails to compensate for the schema gap.

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 a specific operation ('Simulando as parcelas do acordo') and resource ('Acordos'), and includes the exact endpoint (GET /acordos/simularparcelas), so an agent can tell it apart from agreement list/put/desfazer siblings. It does not explicitly contrast itself with those siblings, but the verb and endpoint are unambiguous.

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?

'Obtendo dados para gerar o acordo' implies this should be used to fetch/simulate data before generating an agreement, which is a clear context. However, it provides no explicit when-to-use or when-not-to-use guidance and names no alternative tools.

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