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

With no annotations, the description carries the full disclosure burden. It does add one genuinely useful behavioral trait — execution is 'paid' and only 'completed' runs return output — plus the fact that a signed receipt is produced. However, it omits cost magnitude, authentication/authorization needs, failure behavior, and idempotency, so the disclosure is partial.

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 tight sentences with the tool identity front-loaded and no filler. It loses a point only because undefined acronyms ('RVO', 'R/IV') force the reader to infer meaning from compressed phrasing rather than plain language.

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 must explain the return value, and it names the outputs (RVO plus signed Verification Receipt) but never defines what an RVO is or what the receipt contains. For a paid, zero-parameter primitive whose whole value is its output, that is a meaningful 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?

The tool takes zero parameters, so the baseline of 4 applies. The description cannot and need not add parameter meaning beyond the empty 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 names a resource (investigation reporting) and characterizes the tool as an 'independent evidence-verification primitive,' but the operative verb 'run' is never explained and the jargon ('R/IV', 'RVO') is undefined. Against a sibling set full of near-identical verification tools (agent.action.verify, citation.verify, claim.check), nothing here tells an agent when this primitive is the right one versus those.

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 statement of when to use this tool, when not to, or which sibling it substitutes for. The phrase 'for investigation reporting' implies a context but gives no actionable selection criteria against the many adjacent verify/check tools.

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