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

Beyond the readOnly/openWorld annotations it discloses fetch behavior (single GET, no redirects, public DNS only, 512 KB cap), side-effect boundaries (no account access, no merchant contact, no money movement), the payment and wallet-proof binding model, and the matching-only interpretive limit. It also explains that a signed Ed25519 receipt is returned, which is exactly the kind of context an agent needs before invoking a paid tool.

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 purpose and the list of checks are front-loaded, but the body is a dense run-on with overlap against the schema (HTTPS, single GET, 512 KB appear in both places). Sentences are information-bearing but several could be tightened without loss.

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?

There is no output schema, and the description compensates fully: it enumerates what the report contains (entries with version and date, claimed-version status, duplicate/out-of-order/date-anomaly flags), states the receipt type, and links the evidence contract and human page. Nothing an agent needs to call or interpret the result is missing.

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 100%, so the schema already carries parameter meanings and the 3 baseline applies. The description adds real value by explaining what claimed_version is used for — the report states whether that version has its own entry, is only mentioned, or is absent — which the schema does not convey.

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?

States a specific verb and resource ('submit a changelog or release notes ... with an optional claimed_version') and describes the concrete output: a signed report with per-entry version/date and specific flags. Among the many '*‑check' siblings it is inferable that this one is changelog-specific, but no sibling is named, so differentiation is left to the resource noun rather than explicit routing.

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?

Gives clear operating context: one of text or url must be supplied, URL must be public HTTPS, and pricing/eligibility (0.10 USDC per call, 10 signed-wallet free calls per rolling 30 days). It never states when to prefer this over look-alikes such as wever_api-change-check or wever_docs-freshness-check, and gives no explicit when-not-to-use exclusions.

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