Server Quality Checklist

Tool Scores

• auditA
  4.7/5.0
  Behavior4/5

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

  Annotations already declare readOnly, openWorld, and idempotent hints. The description adds valuable behavioral context by detailing the different behavior for local dist paths (stdio checks) versus hosted URLs (web security checks). No contradictions exist.

  Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

  Conciseness5/5

  Is the description appropriately sized, front-loaded, and free of redundancy?

  The description is concise (three sentences) and front-loaded with the core purpose. Every sentence adds necessary detail (input types, output format) without redundancy or extra words.

  Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

  Completeness5/5

  Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

  Given a single parameter, complete schema coverage, rich annotations, and the mention of an output schema (though not detailed), the description provides all needed context for an agent to correctly invoke the tool.

  Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

  Parameters4/5

  Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

  The input schema has 100% description coverage for the single 'target' parameter, explaining it accepts npm packages, URLs, etc. The description adds context by specifying the three distinct input formats and their corresponding checks, enhancing understanding beyond the schema.

  Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

  Purpose5/5

  Does the description clearly state what the tool does and how it differs from similar tools?

  The description uses the specific verb 'Grade' and resource 'MCP server's agent-readiness and security', clearly distinguishing the tool's purpose. It also enumerates accepted input types, leaving no ambiguity.

  Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

  Usage Guidelines5/5

  Does the description explain when to use this tool, when not to, or what alternatives exist?

  The description explicitly lists the types of targets (npm package, GitHub URL, local dist path, hosted URL) and explains the different checks performed based on target type (stdio vs web security). With no sibling tools, this is sufficient guidance.

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