Vulnerability Registry MCP Server

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states what the tool returns ('full details' with 'associated vendor information'), but doesn't mention error handling (e.g., what happens if the ID doesn't exist), authentication requirements, rate limits, or whether this is a read-only operation. For a tool with zero annotation coverage, this leaves significant behavioral gaps.

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 perfectly concise with two sentences: the first states the purpose and parameters, the second specifies the return value. Every word earns its place, and information is front-loaded appropriately.

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's moderate complexity (single parameter lookup), 100% schema coverage, but no annotations and no output schema, the description is adequate but incomplete. It covers the basic purpose and return scope, but lacks behavioral details that would be crucial for reliable agent use, especially without annotations.

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 fully documents the single parameter. The description adds minimal value by mentioning both CVE ID and internal ID formats, which the schema also covers. Baseline 3 is appropriate when the schema does the heavy lifting.

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 verb ('Get full details') and resource ('specific vulnerability'), specifies the lookup method ('by its CVE ID or internal ID'), and distinguishes from siblings like 'search_vulnerabilities' (which likely returns multiple results) and 'get_vulnerability_stats' (which provides aggregated data).

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 implicitly indicates when to use this tool (when you need full details for a specific known vulnerability ID), but doesn't explicitly state when not to use it or name alternatives like 'search_vulnerabilities' for broader queries. The context is clear but lacks explicit exclusions.

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