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

Annotations cover the safety profile (readOnlyHint=false, idempotentHint=true, destructiveHint=false, openWorld=true), but the description adds genuinely non-structured context: it is a paid call costing 0.05 USDC and requires an X-Bazaar-Key header, plus a free sample report URL. It omits what the audit returns (per-check pass/fail vs. score) and does not resolve why it advertises '6-check' while listing five components.

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?

One dense sentence plus a sample URL; the paid/header tag is front-loaded so cost and auth are visible immediately. The check list is compact but reads as a run-on enumeration, and the sample link competes with substance for the limited space.

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?

With no output schema, the description should say what the audit produces (report structure, verdict, per-check results), yet it only points to an external sample. Cost, auth, and scope are covered, but the return contract — the main unknown for a composite certification tool — is left to the URL.

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?

There is a single optional parameter (network) with 100% schema description coverage, so the schema already carries the semantics. The description only alludes to it via 'CAIP-2 network check' and adds no format examples or default-network behavior, which is the expected baseline-3 outcome when the schema does the explaining.

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 names a specific artifact ('Composite 6-check x402 merchant launch audit') and enumerates the constituent checks (EIP-3009 params, EIP-712 domain separator, CDP + PayAI facilitator compatibility, CAIP-2 network, pricing advisor), so an agent knows exactly what it will run. It stops short of explicitly relating itself to the overlapping siblings (eip3009_params_check, caip2_network_check), so it does not fully differentiate the bundle from its parts.

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?

Usage is only implied through the name 'merchant launch audit' — a pre-launch certification step. There is no explicit statement of when to call this versus running the individual check tools, and no exclusions or prerequisites beyond the paid-key tag.

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