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

Annotations declare destructiveHint: true and openWorldHint: false, signaling this is a mutating action with possible irreversible effects. The description reinforces this by mentioning 'confirmed' and 'explicit confirmation', which are important behavioral prerequisites. It also discloses the need for approval session and the partner handoff. However, it doesn't detail the exact side effects (e.g., what happens to the application status, whether it can be undone) beyond the destructiveHint. Given annotations already flag destructiveness, the description adds context about the approval requirement)Skip. This is not a contradiction, but the description could be more explicit about irreversible changes.

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 two sentences long, each serving a purpose: the first states the function, the second provides critical usage and approval steps. It is front-loaded with the main action and then necessary conditions. It avoids fluff. The only slight issue is that the second sentence is dense with technical details (tool name, action_type, payload), but these are necessary for execution. It could be considered slightly overly detailed, but it 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?

Given the tool's complexity (destructive, requires approval, has nested intake object) and that the description provides the approval workflow and confirmation requirement, it is fairly complete. The schema provides the structure for intake, and the output schema exists. However, the description does not mention what the success/failure response looks like, nor does it specify that applicationId must match an existing application. But the description's coverage of the approval process is strong. For a destructive tool, the guidance on when to call is crucial and present.

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 covers 67% of parameters (applicationId, intake, approvalSessionId). The description adds semantics for approvalSessionId by explaining how to obtain it (via create-approval-session tool). For applicationId and intake, the description doesn't elaborate beyond schema, but the intake object is fairly self-documenting with fields like email, phone, etc. The coverage is good, so baseline 3 is appropriate. However, the description does not clarify the meaning of the `intake` parameter's structure or that it must match a previously saved draft.

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 clearly states the tool's purpose: 'Submits the confirmed W-7 intake and pushes the application to the processing partner.' It identifies the action (submit), the resource (W-7 intake), and the consequence (pushes to partner). The name 'itin_submit_itin_intake' is unambiguous and the description adds context that it is for confirmed intakes only, distinguishing it from siblings like 'itin_save_itin_intake_draft' and 'itin_submit_itin_for_review'.

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 explicitly provides when to use: 'Only call after showing the user a full summary and getting explicit confirmation.' It also details a prerequisite workflow: 'Requires a trusted-device approval: open one with identity's create-approval-session tool...' This is a clear usage guideline that prevents premature invocation. It does not explicitly name alternative tools, but the sibling list shows related tools like 'itin_save_itin_intake_draft' and 'itin_submit_itin_for_review', and the description implies the confirmed state. The guidance is strong enough.

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