CVE MCP Server

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

No annotations are provided, so the description carries the full burden. It discloses the data source (NVD) and key return details, but lacks information on rate limits, authentication needs, error handling, or pagination. It adds some behavioral context but is incomplete for a tool with no annotations.

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 is front-loaded with the core purpose in the first sentence, followed by a concise Args section. Every sentence adds value—no redundancy or fluff—making it efficient and well-structured for quick understanding.

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?

Given the tool has an output schema (which likely covers return values), the description does not need to explain outputs. It covers the purpose, parameter semantics, and key behavioral aspects like data source. However, with no annotations and a single parameter, it could benefit from more explicit usage guidelines or error details to be fully complete.

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 schema description coverage is 0%, so the description must compensate. It provides the parameter name ('cve_id'), clarifies it as a 'CVE identifier', and gives an example ('CVE-2021-44228'), adding meaningful semantics beyond the bare schema. However, it does not detail format constraints or validation rules.

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 states the action ('Look up a CVE by ID from NVD') and the resource ('CVE'), specifying it returns full details including CVSS scores, description, weaknesses, and CISA KEV status. This distinguishes it from siblings like 'get_cve_summary' (likely less detailed) or 'search_cves' (multiple results).

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 implies usage when a specific CVE ID is known, as it looks up by ID rather than searching. However, it does not explicitly state when to use this tool versus alternatives like 'get_cve_summary' or 'compare_cves', nor does it mention prerequisites or exclusions, leaving some ambiguity.

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