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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds only one piece of genuine behavioral context — that verification is against a 'shared trust root' rather than a caller-supplied key. It does not disclose failure behavior (does it throw or return a negative result?) or whether profile selection changes the trust evaluation.

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?

A single front-loaded sentence with no filler or redundancy. It is efficient, though its brevity edges into under-specification rather than true economy.

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?

The description gives a clear purpose and a trust-root context for a verification tool with a readOnly, idempotent, closed-world profile and a declared output schema. The gaps are in parameter semantics (undocumented `profile` and `envelope` structure) rather than in purpose or behavior, and the output schema covers return values.

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 0% and both parameters are undocumented: `profile` has only a default of empty string, and `envelope` is an open object with additionalProperties=true. The description only restates that the envelope is the artifact being verified and says nothing about what `profile` selects or what shape the envelope must have, so it does not compensate for the coverage gap.

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 pairs a specific verb ("Verify") with a specific resource (a 'Certified by ViridisOS' envelope) and names the trust anchor it checks against. That is clear enough to separate it from the certify-style siblings, but it never explicitly states the contrast with viridis_certify_envelope or viridis_certify, so it falls short of full sibling differentiation.

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?

There is no explicit when-to-use, when-not-to-use, or named alternative. The agent can infer that this is the check step after certification, but nothing in the text confirms that ordering, states prerequisites (e.g. needing a trust root configured), or says what to do when verification fails.

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