Delete payment method

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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false. The description adds 'unused' and account scope but does not disclose deeper behavioral details such as permanence or side effects, though the destructive hint partially covers risk.

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 short with no filler, but the first sentence largely restates the tool title/name while the second sentence carries the additional guidance. This slight redundancy prevents a higher score.

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?

For a one-parameter destructive delete operation, the annotations plus the single well-described parameter provide sufficient safety and input context. The 'unused' use case adds useful guidance, and no output schema is expected.

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 schema fully documents paymentMethodId as 'Payment method ID', giving 100% schema description coverage. The description adds no further meaning about how to obtain or validate the ID, so the baseline of 3 applies.

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 uses the explicit verb 'Delete' with the resource 'payment method from your account', making the operation unambiguous. Among the siblings it is the only billing delete-payment-method tool, so it is easily distinguished from get/set payment method tools.

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 second sentence provides a use case: 'remove unused payment methods from user accounts.' However, it does not name alternatives or explicitly state when not to use the tool, such as when the payment method is in use or set as default.

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