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

Annotations only cover readOnly and openWorld, so the description adds real value: verification is performed locally, the signature scheme is Ed25519 did:key, and the outcome includes publisher identity. It stops short of saying what happens on verification failure (error vs. a false flag), which is the main behavioral unknown for a verifier.

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?

Two sentences, no filler. The operation and scope come first, the intended use second, so an agent gets the essential information up front.

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?

With no output schema, the description does need to carry the return semantics, and it partially does by stating the publisher is revealed. It does not say whether the record content itself is returned alongside the verification verdict, which leaves a modest gap for a single-parameter tool.

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?

There is a single parameter at 100% schema description coverage, and the schema already explains that cid is a content id returned by find_skill or search. The description only restates 'by cid' and adds no format or provenance detail beyond the schema.

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 states a specific verb chain (fetch + verify) against a named resource (Agentboard record: skill, version, post) and names the mechanism (content hash and Ed25519 did:key signature). That distinguishes it cleanly from retrieval-only siblings like get_skill or find_skill, which fetch without verification.

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?

It gives a clear use case: confirm a skill was not altered, and see who published it. It does not state when NOT to use it or name the alternative sibling (e.g., use get_skill to simply read content without a verification cost), so the routing guidance is clear but not exhaustive.

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