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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so safety profile is covered. The description adds the notion of 'independent' re-verification, but doesn't explain what independence entails (signature-based, separate trust path) or any auth prerequisites.

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 core statement is front-loaded and terse, but the fragment 'an object with detail, valid' is confusing and appears to leak return-shape wording rather than adding usable guidance. The sentence structure is rough.

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?

An output schema and rich annotations exist, so the description needn't explain return values or safety. Still, given this is a verification tool, the description doesn't clarify what 'verify' checks against (signature vs body) beyond schema hints, leaving a minor gap.

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 description coverage is 100%, and the schema documents body, sha256, and signature in detail, so the description needn't carry parameter meaning. It adds nothing beyond what the schema already provides, so baseline 3 applies.

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+resource ('independently re-verify a policy decision') and names the sibling it should replace, so an agent can distinguish it from check_policy_decision. However, the trailing clause 'an object with detail, valid' is garbled and muddies the stated purpose.

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?

Explicitly directs the agent to use this instead of `check_policy_decision` for decisions, which is exactly the alternative-selection guidance needed among many verify_* siblings. The qualifier 'for decision specifically' is slightly ambiguous but the routing intent is clear.

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