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

With no annotations provided, the description must disclose behavioral traits. It does disclose the cost ('Paid (~$0.0002)') and output format, which is helpful. However, it does not mention idempotency, rate limits, or any specific requirements beyond the input schema. The read-only nature is implied but not explicit.

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 description is two sentences, front-loaded with the core purpose, and contains no superfluous words. Every sentence adds value: purpose, audience, cost.

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?

Given no output schema, the description usefully specifies the return format. It also explains the trust model and cost. However, it lacks details on error handling or edge cases, which would be valuable for a paid tool. Overall, it is fairly complete for a simple verification 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?

Schema description coverage is 0%, so the description must add meaning beyond the schema. While it mentions 'receipt_b64' and 'image_id' in context, it does not explain their format, constraints, or how they relate to the verification process. This adds minimal value over 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 clearly states the tool's action: 'Verify a RISC Zero receipt against an image_id' and specifies the output format '{valid, journal_b64}'. This distinguishes it from sibling tools like 'prove_*' which create proofs, not verify.

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 description explains who can use it ('Anyone can check an attestation without trusting the prover') and implies when to use it (when verifying an attestation). It does not explicitly state when not to use or name alternatives, but the context is clear given no sibling tool performs verification.

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