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

With no annotations provided, the description carries the full burden, and it does well: it warns that the operation is destructive, reduces domain security, stages rather than immediately executes, returns an actionId, and instructs the agent to get user approval before finalizing. This is excellent behavioral disclosure.

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 names the operation, states the risk, specifies the required parameter, and explains the actionId flow. Every sentence adds necessary information.

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?

The description covers the key context: the action, the destructive effect, the required parameter, and the confirmation step. It is slightly vague about what 'the summary' refers to and assumes the user has an existing domain eligible for unlocking, but overall it is complete enough for a two-parameter tool with no output schema.

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 only 50% because the domain parameter lacks a description, but the tool description adds the required format with 'example.com'. The sessionKey parameter is already well-described in the schema, so the combined coverage is sufficient.

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 a specific verb and resource: it stages removal of the registrar lock from a domain. It clearly distinguishes itself from the sibling lockDomain by stating it removes the lock, and it connects the action to enabling transfers.

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?

It gives clear context for when to use the tool — when a domain lock must be removed to allow transfers — and explains the required follow-up flow via executeConfirmedAction. It does not explicitly name alternatives or exclusions, but the usage context is strong.

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