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

With no annotations, the description carries the full behavioral burden and does disclose real traits: a recipient notification side effect, cancellation of pending transfer requests, and idempotent behavior when no active code exists. It omits auth/permission requirements and the failure mode for an already-confirmed transfer, keeping it short of a 5.

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?

Two sentences, both front-loaded with the action and its side effect, and the idempotency guarantee placed second where it belongs. No filler.

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 single-parameter mutation with no annotations and no output schema, the description covers the action, its collateral effect, the notification, and retry safety. Only the permission/authorization requirement and the id's exact referent are missing.

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?

Only one parameter (id, uuid) and schema description coverage is 0%. The phrase 'a domain's active transfer code' implies id identifies the domain, which adds some meaning, but the description never states this explicitly nor clarifies whether the id is the domain or the transfer record.

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 verb+resource (revoke a domain's transfer code) plus a secondary effect (cancel pending transfer requests), which clearly separates it from siblings like domain_transfer_create_code, domain_transfer_request, and domain_transfer_confirm. An agent can route to it 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?

Usage is implied by the sibling set (it is the inverse of domain_transfer_create_code), and the idempotency note implies it is safe to call when unsure. However, it names no alternative or condition (e.g. when to use this versus letting a transfer expire, or which domain states it applies to), so the guidance is inferred rather than stated.

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