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

Annotations already disclose the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=true, non-idempotent). The description adds genuinely useful behavioral context that annotations cannot: the operation is asynchronous, the receipt is not the finished report, and no implementation/payment/deployment follows. The phrasing is muddled, so the disclosure is present but not crisp.

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 text is dense and somewhat front-loaded, but the long negation list reads as legal disclaimers rather than actionable specification, and the key ordering behavior is buried behind the 'Diagnostic report' lead. Sentences are grammatically efficient but not maximally informative per word.

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?

An output schema exists so return values need not be explained, but for a 7-parameter, non-idempotent, open-world mutation with 0% schema coverage the description should define the parameters and the async delivery/callback contract. As written, an agent lacks enough to call it correctly beyond guessing from names.

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% across 7 parameters, so the description carries the full burden of explaining goal, resource_url, callback_url, constraints, response_format, contact, and language. It explains none of them, leaving an agent to infer semantics from bare property names and constraints alone.

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 conveys a specific verb+resource: it creates a durable order that yields an asynchronous diagnostic report for x402 endpoints. However, it leads with 'Diagnostic report' rather than the ordering action, and it never distinguishes this from siblings audit_x402_endpoint and inspect_x402_endpoint, so an agent cannot easily tell which of the three to pick.

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 a hint of a prerequisite ('An explicitly authorized x402 purchase creates a durable order'), but no explicit statement of when to use this tool versus the audit/inspect siblings. The closing negative list ('No implementation, human consultation, target payment, deployment...') describes scope exclusions, not selection guidance.

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