qm_data_httpcheck

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

With no annotations, the description carries the full behavioral burden and does so thoroughly: pricing ($0.01 USDC on Base via x402), the two-phase payment flow, the trust boundary ('never pays, never touches private keys, never holds funds'), the non-erroring failure semantics, and resale rights. This is well beyond what a name alone conveys.

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?

Front-loaded with the core capability, then payment mechanics, then trust/resale notes — a sensible ordering with no filler sentences. It is mildly verbose because the payment and 'never touches private keys' points are repeated across the description and the schema text.

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 2-parameter tool with no output schema, the description covers what an agent needs: what is verified, what comes back, the payment protocol, the retry loop, the trust constraints, and failure behavior. Nothing material is left for the agent to guess.

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 100%, so the baseline is 3; the description goes further by explaining the ordering semantics of 'payment' (omit on first call, then re-call with the signed payload) and clarifying that the server only forwards it to the rail. It adds process context the schema states more tersely, though the two overlap substantially.

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 first sentence gives a specific verb ('Verify'), resource ('webhook or endpoint'), and enumerates the outputs (status code, redirect chain, headers, timing), so an agent knows exactly what it does. It does not, however, distinguish itself from the very similar sibling qm_probe_endpoint, which is a notable omission in this tool family.

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?

It gives a clear, actionable usage procedure: call without 'payment' to receive live requirements, pay from your own wallet, then re-call with 'payment'. It also states the failure mode ('a down target returns an honest unreachable result instead of an error'), which helps the agent reason about outcomes. It stops short of naming when NOT to use it or which sibling to prefer.

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