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

With no annotations provided, the description carries the full disclosure burden. It explicitly warns that the operation is DESTRUCTIVE and irreversible, notes that authentication is required, and reveals the staged two-phase behavior where cancellation is not completed until executeConfirmedAction is called.

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 compact and front-loaded: it opens with the core purpose and destructive warning, then covers authentication, the required parameter, return value, and the exact follow-up action. Every sentence earns its place.

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 two-parameter tool with no output schema, the description provides the required inputs, the output contract (actionId), the authentication requirement, the destructive nature, and the next step. Nothing essential is missing for an agent to use this tool correctly.

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 only documents sessionKey, while domain has no description. The description compensates for domain by marking it required and giving an example ('example.com'). It does not add much about sessionKey, but the schema already explains that parameter well.

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 states a specific action ('Stage cancellation of a pending domain transfer') with the resource clearly identified as domain transfers. It also distinguishes this tool from executeConfirmedAction by framing it as the staging step rather than the execution step.

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 clearly indicates this is for pending domain transfers and provides an explicit workflow: present the summary to the user and call executeConfirmedAction with the returned actionId if the user approves. It lacks explicit 'do not use when' guidance, but the context is clear and the follow-up tool is named.

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