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

Annotations only give hint flags; the description adds real behavioral context beyond them: explicit pricing (0.10 USDC on Base), a free-tier quota (10 signed-wallet calls per rolling 30 days), a pointer to the 402 body for x402 terms, and firm boundary statements ('does not connect to a server or grant authority', 'no provider work, callbacks, document retrieval or signed attestations'). The one gap is that readOnlyHint=false while the text describes a pure caller-supplied computation, leaving the exact state effect (payment) implicit.

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 front-loaded with billing terms rather than the task, and repeatedly restates the same authority disclaimer ('This adapter grants no authority', 'does not grant authority', 'grants no authority'). Several sentences duplicate the same operating-boundary point, diluting signal.

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 complex, paid, no-output-schema tool the description covers payment, quotas and operating limits, which is genuinely useful. It stops short, however, of describing what the operation returns (the flagged inventory/annotation findings) or the required shape of the 'tools' payload.

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% and the single 'tools' array parameter is never explained in the description. The phrase 'submitted MCP tool declarations' hints at the item shape (name/annotations/description) but no format, cardinality limit (16), or required-field detail is conveyed, so the description does not compensate for the coverage gap.

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 operative sentence — 'Inventory submitted MCP tool declarations and flag missing or consequential annotations' — gives a specific verb and resource and is distinguishable from the payment/handoff siblings. However, it is buried under pricing boilerplate, so an agent must dig past the billing preamble to find the actual purpose.

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 names access paths ('/api/mcp or /api/service-resolver', 'POST /api/mcp-diligence-rail') and pricing tiers, but never states when to use this tool versus alternatives like wever_diligenceops-paid-run or wever_payment-authority-inspector. No exclusions, no scenario guidance.

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