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

With no annotations, the description carries the full burden. It does disclose two behavioral traits: execution is paid and completion returns an RVO plus a signed verification receipt. But it omits permissions, idempotency, what happens on incomplete payment, rate limits, or what 'RVO' means, leaving significant gaps for a mutation-like verification primitive.

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 that are front-loaded with purpose and then output. No unnecessary filler. The repeated 'R/IV' branding is slightly redundant but does not bloat the description.

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 and no annotations, the description must explain invocation and results. It mentions the return type (RVO and signed receipt) but leaves RVO undefined and, critically, does not explain how a claim is specified given zero input parameters. This is a major gap for a tool that presumably needs to know which claim to check.

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 are 0 parameters, so the baseline is 4. The description does not need to document parameters, and no parameter semantics are required.

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+resource: 'independent evidence-verification primitive for claims'. That is clear enough to know the tool verifies claims with independent evidence. However, it does not differentiate from siblings like claim.monitor or citation.verify, and undefined acronyms (R/IV, RVO) slightly muddy the 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?

No guidance on when to use this tool versus alternatives. The phrase 'independent evidence-verification' implies a context, but there is no explicit when/when-not, no prerequisites, and no mention of sibling tools such as claim.monitor or contradiction.scan.

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