Server Quality Checklist

Tool Scores

• sum_numbersA
  3.8/5.0
  Behavior2/5

  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 states the tool returns a sum, which implies a read-only operation, but does not disclose any behavioral traits such as error handling, performance characteristics, or limitations (e.g., handling of empty lists or large numbers). This leaves gaps in understanding how the tool behaves beyond its basic function.

  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 front-loaded with the core purpose in the first sentence, followed by a structured 'Args' section. Every sentence earns its place by providing essential information without redundancy, making it highly efficient and well-organized.

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

  Completeness4/5

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

  Given the tool's low complexity (one parameter, simple function) and the presence of an output schema (which handles return values), the description is mostly complete. It covers the purpose and parameter semantics adequately, but could improve by addressing behavioral aspects like error cases or performance, which are not covered by annotations or schema.

  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 description adds meaningful context beyond the input schema, which has 0% description coverage. It explains that 'numbers' is 'a list of integers to be summed,' clarifying the parameter's purpose and type. However, it does not provide details on constraints like list size or integer ranges, leaving some semantic gaps.

  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 clearly states the tool's purpose with a specific verb ('Returns the sum') and resource ('a list of integers'), making it immediately understandable. It distinguishes itself by focusing solely on summation without any ambiguity about its function.

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

  Usage Guidelines3/5

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

  The description implies usage by specifying it sums integers from a list, but provides no explicit guidance on when to use this tool versus alternatives. Since there are no sibling tools, this is adequate but lacks any context about prerequisites or constraints.

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