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

Discloses the adversarial verification process, live web research, cost, timing, and the behavior of returning a quote without a payment argument. Annotations are absent, so the description carries the burden well.

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 four sentences long, front-loads the core concept, and includes cost and timing. Every sentence adds necessary information with no redundancy.

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?

Covers the tool's purpose, parameters, workflow, and pricing. Lacks details on the exact format of the returned verdict and error handling, but for a tool with no output schema and good parameter descriptions, it is fairly complete.

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 100%, so baseline is 3. The description adds context beyond schema descriptions: explains the purpose of context, the nature of payment as x402 payload, and that claimed_sources will be scrutinized. This adds meaningful value.

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 performs independent adversarial verification with live web research, refuting a claim. It distinguishes from siblings by specifying its full verification process versus quick or pricing variants.

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?

Explicitly advises use before irreversible commitments dependent on current-world facts and explains how to obtain a quote without payment. Lacks explicit when-not-to-use or comparisons to siblings.

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