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

The annotations already establish that this is a read-only, idempotent, non-destructive, open-world lookup, so the description's job is to add context beyond that. It does: it names the upstream source (NIST NVD), enumerates the return payload (description, CVSS score, severity, dates, CWE, references), and discloses a cost of 1 credit, which is operationally meaningful for an agent budgeting calls. It does not cover behavior for missing CVEs or ID format edge cases.

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?

Three tight sentences that front-load the identity of the tool, then the return contents, then the cost. The only waste is the duplicated CVE example already present in the schema; otherwise every clause carries information.

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 must carry the return-value burden, and it does so by enumerating every field an agent can expect, plus the data source and credit cost. For a one-parameter lookup this is nearly complete; only error/not-found behavior is unaddressed.

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% for the single cve_id parameter, and the schema already supplies the format and the CVE-2021-44228 example. The description repeats the same example without adding syntax rules, validation expectations, or normalization guidance, so the schema does the heavy lifting and baseline 3 applies.

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 resource (a single CVE, retrieved by its CVE ID) and a specific behavior (returning details), with a concrete example identifier. That verb-plus-resource specificity implicitly separates it from package-scanning siblings like vuln_check or package_info, but no sibling is actually named or contrasted.

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?

When-to-use is only implied: an agent can infer this is the tool for looking up one known CVE identifier. There is no explicit guidance on when to prefer it over vuln_check or other vulnerability-adjacent tools, and no statement about what happens with an unknown or malformed ID.

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