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

Annotations indicate write (readOnlyHint=false) but no destructive flag. The description adds that the tool works only with a secret key ('só sk_') and hints at required fields in the data parameter, providing context beyond 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 a single concise sentence that front-loads the main action. It could be improved by structuring information more clearly, but it efficiently conveys the core purpose.

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?

The description covers the main action and the data parameter's content but omits the purpose of the 'account' parameter and does not mention the response format. Given the simplicity of the tool, this is acceptable but not fully 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?

With 0% schema description coverage, the description compensates by explaining 'data = JSON do corpo (amount, recipient_id, …)', adding meaning to the otherwise opaque schema. However, the optional 'account' parameter is not described.

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 'Cria uma transferência no Pagar.me V5', clearly indicating the action (create) and the resource (transfer). It specifies the API version and key type ('só sk_'), distinguishing it from sibling tools like pagarme_transfers_get and pagarme_transfers_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 implies usage for creating transfers but does not explicitly state when to use this tool versus siblings like pagarme_recipients_transfers or pagarme_recipients_withdrawals. No exclusion criteria or alternative tool names are provided.

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