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

Annotations only say this is a non-read-only, non-destructive, open-world write; the description adds real value by disclosing the synchronous-vs-approval-queued behavior and the permission precondition. It stops short of saying what workflow.state values mean or what happens if neither setting flag is supplied, which an agent would need to know.

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?

Three tight sentences with the primary action front-loaded and no filler. The closing fragment 'workflow.state says which' is efficient but borders on cryptic without stating the possible states.

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 mutation tool with no output schema and zero parameter documentation, the description covers the approval flow and role precondition but omits the target identifier, the effect of omitting a flag, and how the caller reads workflow.state to confirm the outcome.

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 0%, so the description must carry the load. It meaningfully maps 'WHOIS privacy' to privacy_enabled and 'transfer lock' to transfer_lock, but the required 'domain' parameter is never mentioned and no flag semantics (omitted = unchanged?) are given.

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?

Names a specific verb ('Change') and the exact settings touched (WHOIS privacy, transfer lock), which distinguishes it from the many adjacent setters in the sibling list such as set_auto_renew, set_nameservers, and set_contacts. An agent can pick this tool without opening the schema.

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?

Gives a clear usage condition: it applies immediately only when the caller acts for an owner/admin and the workspace permits agent-applied changes; otherwise the request lands in list_approvals. It does not explicitly rule out alternatives, but the conditional routing is concrete and actionable.

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