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

With no annotations supplied, the description usefully discloses that the tool is free, requires no x402 challenge, and has an HTTP GET equivalent. The service version, pinned corpus identity, and reproducibility statement add meaningful provenance and operational context beyond a generic read operation.

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 front-loads the resource and its exact contents, then compactly covers workflow, payment behavior, and the HTTP equivalent. The hyphenated payment phrasing is slightly awkward, but there is no material filler or repetition.

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 zero-argument criteria lookup, the definition covers the service version, expected subject matter, recommended usage point, cost, payment-challenge behavior, and reproducibility. Although there is no output schema, the explicit content list provides enough guidance for correct selection and invocation.

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?

The tool has no parameters, so there are no argument semantics requiring supplementation. "Call directly" reinforces the simple invocation without introducing any ambiguity.

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 identifies a lookup of the published Ledger-Line Completeness criteria and specifies its contents: seven graded fields, presence rules, the census form, and the pinned test corpus identity. It implies differentiation from the checking and precheck siblings but does not name them or explicitly state that this tool does not perform a check.

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?

"Read these before paying" gives a concrete point in the workflow, and the payment note clarifies that this criteria lookup itself can be called directly. Routing to the appropriate paid checking or precheck sibling is left to inference rather than stated explicitly.

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