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

The description adds genuinely useful scope caveats beyond the annotations: it never calls business tools, requests private service credentials, or grants whole-platform permissions. But the annotations declare readOnlyHint=false and destructiveHint=true, and the phrase "This reads public proof only" invites an agent to read this as a safe read operation, while the description never discloses that verification mutates state (consuming the claim/token or marking the URL verified). For a destructive, non-idempotent-looking verification step, that omission is material.

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?

Purpose is front-loaded in the first sentence, followed by a short, high-value safety paragraph. The Args block duplicates schema text at 100% coverage, which is the only real waste, but the overall length is proportionate to a two-parameter tool.

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 exists, so return values need not be explained, and the parameter prerequisites are covered. What is missing is the post-verification state change — whether the token is single-use, whether the claim becomes permanently verified, and whether a failed attempt burns the token — which matters given destructiveHint=true.

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%, so both parameters are already documented, and the description's Args block largely restates those same strings verbatim. No extra semantics (e.g., token format, single-use nature, expiry) are added. Baseline 3 is appropriate where the schema carries the load.

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 and resource ("Verify public ownership proof") scoped to "your own exact service URL claim," which is distinguishable from the sibling claim_service_url that creates the claim in the first place. The link is reinforced by naming claim_service_url as the source of claim_id. It stops short of explicitly contrasting with execute_paid_verification or other verification paths, but the core purpose is unambiguous.

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 workflow is implied rather than stated: claim_id comes "returned by claim_service_url" and the token is the one "after publishing it in the instructed location," so an agent can infer this is the second step. However, there is no explicit when-to-use/when-not statement, no mention of what to do if verification fails, and no guidance on prerequisites beyond the parameter notes.

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