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

With no annotations, the description carries the full burden and does disclose meaningful behavior beyond structured fields: cost ($0.001 per call via x402, USDC on Base) and that responses carry a provenance chain and Ed25519 attestation. It omits failure/error behavior and what happens when payment is absent or invalid.

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?

Two dense sentences, front-loaded with the core purpose and followed by the pricing/attestation facts. No filler or redundancy.

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 simple single-id lookup with no output schema, the description adequately covers what the tool returns and its payment model. It leaves minor gaps around identifier format and error/payment-failure behavior, but nothing critical to invoking it correctly.

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 50% (only 'payment' is documented, and its schema note already explains the free-quote fallback). The description adds cost context and implies the identifier is a CVE id via 'by CVE identifier', but gives no format detail (e.g. CVE-YYYY-NNNNN) beyond what the schema implies.

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 states a specific verb and resource (NVD CVE detail lookup by CVE identifier) and enumerates the returned content: description, CVSS metrics, CWE mapping and dates. This scope distinguishes it from siblings like kev_status_by_cve (KEV-only) and cve_published_daily_summary (daily aggregate).

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?

There is no when-to-use guidance, no mention of prerequisites, and no routing to alternatives such as kev_status_by_cve for exploit-status questions. The agent must infer usage purely from the tool name and sibling set.

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