VibeCheck MCP Server

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

With no annotations provided, the description carries full burden and does well by disclosing key behavioral traits: it specifies the data source (GitHub Advisory Database), describes the return format (CVEs, severity levels, patched versions), and lists important prerequisites (npm installation, lock file requirements). However, it doesn't mention potential rate limits, execution time, or error conditions.

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 structured and concise: purpose statement first, then behavioral details, then requirements. Every sentence earns its place with zero wasted words, and the 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?

For a tool with no annotations and no output schema, the description does well by explaining what the tool returns and its prerequisites. However, it could be more complete by describing error conditions, typical execution time, or providing examples of the output format since there's no output schema to reference.

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?

With 100% schema description coverage, the schema already documents both parameters thoroughly. The description doesn't add any meaningful parameter semantics beyond what's in the schema - it mentions lock file requirements but doesn't connect them to the 'path' parameter or provide additional context about the boolean flag.

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 tool's purpose with specific verbs ('Run npm audit', 'check dependencies for known vulnerabilities') and distinguishes it from the sibling tool 'scan_codebase' by focusing specifically on dependency vulnerability checking rather than general codebase scanning.

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 provides clear context for when to use this tool (checking dependencies for vulnerabilities) and includes explicit requirements (npm installed, lock file present), but doesn't explicitly state when NOT to use it or mention alternatives to the sibling tool beyond the implicit distinction.

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