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

Annotations already declare idempotent=true, destructive=false, openWorld=false, so the safety profile is covered. The description adds real context beyond that: it clarifies this is not the buyer-facing sign/submit step and constrains which code may be used. It omits auth requirements and any rate/limit behavior.

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, front-loaded with the action, then the boundary, then the warning. Every sentence earns its place, though the code-reuse caveat could be grouped with the main instruction for slightly better flow.

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 high-complexity mutation with 7 required params, nested objects, and no output schema, the description covers purpose and boundaries but leaves the parameter contract and workflow position largely unexplained. Adequate but with clear gaps given the tool's complexity.

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 14% across 7 required params, so the description must carry the load, yet it only adds meaning to the 'code' parameter. The complex nested params (documents, selection, planRevision, planConfirmationId, challengeId) receive no semantic explanation anywhere, leaving the multi-step confirmation inputs opaque.

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?

States a specific verb ('Confirm') and resource ('the exact complete pack') tied to a pack review. It adds a scoping contrast ('does not sign or submit to the buyer') and warns off sibling codes, so an agent can distinguish it from the sign/submit steps, though it never names the sibling confirm tools directly.

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 clear conditions: use the final reviewer's explicitly supplied code, and never reuse a plan-agreement or individual-file code. That implicitly routes the agent away from confirm_plan_agreement and confirm_document_review, but it does not state the prerequisite flow (e.g. that a request_pack_review challenge must precede it).

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