Configurar webhook de uma chave Pix

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

Annotations already indicate destructive and idempotent behaviors. The description adds context about prerequisites (endpoint preparation) and the replacement effect, but does not detail response or error conditions. 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?

Two sentences, no unnecessary words. The description is front-loaded with the core action and efficiently includes usage guidance.

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 comprehensive annotations and the presence of an output schema, the description adequately covers prerequisites and the replacement behavior. It could mention idempotency or that a successful response confirms the webhook is set, but it remains fairly 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?

Schema coverage is 100% with clear parameter descriptions. The description does not add additional meaning beyond what the schema already provides for 'webhookUrl' and 'chave'.

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 configures a webhook URL for Pix events associated with a key, using specific verbs and resources. It distinguishes itself from sibling tools like pix_list_webhook or pix_delete_webhook by focusing on configuration.

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 advises use after preparing the callback endpoint with security requirements and notes that it replaces the applicable destination. However, it does not explicitly contrast with alternative tools or mention when not to use.

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