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

Beyond the annotations, the description discloses important behavioral traits: it deducts from the account balance, returns an actionId, and only stages the transfer rather than completing it. Since annotations only indicate readOnlyHint=false and destructiveHint=false, the description adds critical side-effect and workflow information that an agent needs.

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 three concise sentences with no filler. It front-loads the core purpose, then adds the critical side effect, then explains the required follow-up action. Every sentence earns its place and no information is repeated from the schema.

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 staged-mutation tool with no output schema, the description covers the essential context: it states the side effect, the return value, and the exact next step the agent must take. Combined with a fully described input schema and relevant annotations, an agent has enough information to invoke the tool correctly and handle the result.

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 input schema already provides 100% parameter coverage, including descriptions for domain, authCode, sessionKey, and registrantInfo. The description does not add parameter-level detail, but it also does not need to. With full schema coverage, the baseline score of 3 is appropriate.

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 and resource: 'Stage transfer of a domain from another registrar to OSIR.' It clearly conveys this is a two-phase operation that returns an actionId and defers completion to executeConfirmedAction, which helps distinguish it from siblings like initiateTransfer. However, it does not explicitly name an alternative tool for comparison, so differentiation is implicit rather than direct.

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 gives clear usage context: use this tool to stage a domain transfer, and after presenting the summary to the user, call executeConfirmedAction if they approve. It does not explicitly state when not to use it or name alternatives such as initiateTransfer or getTransferQuote, but the action-flow guidance is enough for an agent to know the intended sequence.

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