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 the important behavioral detail that verification uses a pinned signer key, but it omits failure semantics, whether verification is local or remote, and whether there are side effects or specific error behaviors.

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?

The single sentence is front-loaded and wastes no words. It is appropriately terse for a simple action, though the terseness leaves important gaps that are better captured under contextual completeness.

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?

For a tool with a nested object parameter, no output schema, and no annotations, one sentence is not enough. It lacks return-value semantics, failure behavior, and any description of the receipt structure, leaving the agent under-informed for correct invocation.

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 coverage is 0%, and the single required receipt parameter is a nested object with no field-level documentation. The description does not explain what shape a receipt must have or what fields are expected, so it fails to 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 gives a specific verb and resource: verify a receipt against the pinned signer key. This is clear enough to distinguish it from generic listing/status siblings, but it never explicitly differentiates itself from sandbox_cached_verdict or sandbox_gate.

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 guidance on when to use this tool versus the alternatives. An agent must infer from the name that this is for fresh verification rather than cached verdicts, but the description provides no such routing information.

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