createCreditCard

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

With no annotations provided, the description bears full responsibility for disclosing behavioral traits. It fails to mention side effects, required permissions, return behavior, or any post-creation details. The phrase 'Criar cartão de crédito' provides no additional context beyond the tool's name.

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 extremely short, but this is under-specification rather than effective conciseness. It lacks essential information about parameters and behavior, so it does not earn its place as a helpful boundary artifact. It is not front-loaded with useful content; it is simply a phrase.

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's complexity (5 required parameters), lack of annotations, and existing output schema, the description is completely inadequate. It does not explain what the tool does beyond the name, how the parameters influence creation, or what the response will contain. This is a significant completeness gap.

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 only 40%, and the description does not compensate. It does not mention any parameters, their meanings, or how they map to the creation process. The minimal coverage from the schema is insufficient, and the description adds zero value for parameter understanding.

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 'Criar cartão de crédito' clearly states the action (create) and the resource (credit card), distinguishing it from siblings like updateCreditCard and deleteCreditCard. It uses a specific verb and resource combination, meeting the highest bar for purpose clarity.

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?

There is no guidance on when to use this tool versus alternatives. The description merely restates the action without mentioning scenarios like 'use this to add a new credit card' or exclusions. Context is implied only by the verb, not explicitly stated.

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