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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful behavioral context about pagination and filter capabilities, but does not disclose response format, default page size, or auth requirements. No contradiction with 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 very concise and front-loads the core action ('Lista contas a receber'), followed by pagination and filter details. The reference to the internal PHP filename adds minor noise but does not seriously hurt readability, and there is no wasted content overall.

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 tool has four optional parameters and no output schema, the description should clarify more of the parameter semantics and pagination behavior. It does mention pagination and the most important filter keys, but lacks details about `page`, `search`, `account`, and the returned data shape. Adequate for a basic list tool but with clear gaps.

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 input schema has 0% description coverage, so the description is the only place parameter meaning is explained. It provides partial semantics for the `filters` parameter (dataInicial/dataFinal, situacao, nomeCliente) but leaves `page`, `search`, and `account` completely unexplained, and the filter list is incomplete ('etc.'). This only partially compensates for the lack of schema descriptions.

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 lists accounts receivable (contas a receber), identifies the underlying endpoint, and notes pagination support. It does not explicitly differentiate itself from sibling tools like tiny_list_payables or tiny_list_invoices, but the resource name is specific enough to convey purpose.

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 when to use the tool by mentioning it lists receivables with optional filters such as date range, status, and client name, but it provides no explicit guidance on when to prefer this over sibling list tools or when not to use it. Usage context is present but not directive.

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