cybersecurity-vuln-mcp

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

With no annotations provided, the description carries full behavioral disclosure burden and excels at detailing the return value structure—specifically listing aggregated intelligence sources (NVD details, CISA KEV status, EPSS scores, MITRE ATT&CK techniques). Minor gap: no mention of rate limits, caching, or authentication requirements.

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?

Single dense sentence is front-loaded with the action verb, followed by a colon-delimited list of specific data sources. Zero redundancy; every clause specifies either the lookup target or a component of the returned intelligence envelope.

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?

Absence of output schema is fully compensated by the description's detailed enumeration of returned data fields (CVSS scores, CISA KEV status, EPSS probability, ATT&CK techniques). For a single-parameter lookup tool, the description provides complete behavioral and return-value context.

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?

Input schema has 100% description coverage with pattern validation and example provided. Description references 'by ID' aligning with the cveId parameter, but does not need to add parameter syntax details given the schema's completeness. Baseline score appropriate for high-coverage schemas.

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?

Description uses specific verb 'Look up' with resource 'CVE by ID' and clearly distinguishes from siblings by specifying ID-based retrieval versus the search/listing functions of vuln_search, vuln_trending, etc. The enumerated data sources (NVD, CISA KEV, EPSS, MITRE) precisely define the tool's scope.

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 phrase 'by ID' implies this requires a specific CVE identifier, distinguishing it from vuln_search likely used for keyword queries, but there is no explicit 'when to use/when not to use' guidance or named alternatives. Usage must be inferred from the input requirement.

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