domains_cancelPendingIRTPVerificationV1

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

With no annotations provided, the description carries the full burden. It discloses the effect (cancel verification, back out of a WHOIS change) and the specific scenario (confirmation email cannot be received). However, it does not mention side effects, whether the action is reversible, or the expected outcome after cancellation, so it falls short of a perfect score.

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 concise, using two sentences with the action stated first. It is front-loaded with the core purpose and includes a brief, relevant example of when to use it. No wasted words.

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 simple cancellation tool with a single parameter, the description covers the purpose, usage context, and rationale. It lacks an output schema, but the given information is sufficient for an agent to select and invoke it appropriately, though it could mention expected outcomes or errors.

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 the 'domain' parameter described as 'Domain name'. The description does not add any additional semantics beyond that, so the schema alone adequately documents the parameter, yielding the baseline score of 3.

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's action: 'Cancel a pending IRTP verification.' It also explains the context (backing out of a WHOIS change stuck on registrant confirmation), which distinguishes it from related tools like domains_getPendingIRTPVerificationV1.

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?

Explicit usage guidance is provided: 'Use this endpoint to back out of a WHOIS change that is stuck waiting on registrant confirmation... without waiting out the 5-day expiry.' This tells when to use and implies the alternative of waiting, offering clear decision-making context.

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