Criar cobrança Pix Automático sem txid

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

The description adds context that the tool is for automatic charges and the system assigns txid, but no further behavioral details beyond what annotations provide. Annotations already indicate it's a write operation (readOnlyHint=false), and the description aligns. No contradiction.

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 two sentences, front-loaded with the action and purpose, with no wasted words. Highly concise.

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 complexity of the input schema (nested objects) and the existence of an output schema, the description is succinct but covers the essential scenario. It completes the picture for an agent to understand when to use the tool.

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 100%, so the baseline is 3. The description does not add any meaning about parameters beyond what the schema already provides.

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 creates a PIX Automatic charge and lets Efí assign the txid, distinguishing it from the sibling tool pix_create_automatic_charge_txid that requires specifying the txid.

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 explicitly tells when to use it: for established recurrences when the application doesn't need to choose the identifier. It implies when not to use (when txid is needed) but doesn't name the alternative explicitly. Clear context.

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