Server Quality Checklist

Tool Scores

• generate_candy_imageC
  2.9/5.0
  Behavior2/5

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

  With no annotations provided, the description carries the full burden of behavioral disclosure. It discloses the two main operations but omits critical details such as output format, whether the removal is automatic, potential side effects on the generated image, or any limitations. This leaves the agent under-informed about the tool's runtime behavior.

  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 a single, concise sentence that front-loads the core action. It avoids wordiness and includes no redundant information, achieving optimal efficiency.

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

  Completeness2/5

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

  Given the tool's moderate complexity (5 parameters, no annotations) and zero schema description coverage, the one-line description is insufficient for an agent to invoke it correctly. The presence of an output schema does not compensate for missing parameter semantics and usage context.

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

  Parameters1/5

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

  Schema description coverage is 0%, and the description provides zero explanation of the parameters (style, request, composition, output_name, extra_details). The description must compensate for the lack of schema documentation but fails entirely, leaving agents without clues to what each parameter means.

  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 a two-step action: generate a candy image using OpenAI and then remove its white background. This is a specific verb-plus-resource statement that distinguishes the tool from sibling tools like 'remove_background' and 'refine_candy_prompt' by combining both generation and background removal.

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

  Usage Guidelines2/5

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

  No explicit guidance is provided on when to use this tool versus alternatives. While the description implies a use case (generating a new candy image with a cleaned background), it does not mention that users needing only background removal should use 'remove_background' instead, nor does it outline any prerequisites or exclusions.

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

• refine_candy_promptB
  3.1/5.0
  Behavior2/5

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

  No annotations are provided, so the description must carry the full burden of behavioral disclosure. It only states the core function and does not mention any side effects, return values, or limitations. For a transformation tool, there's no context about output format or relationship to other tools, so transparency is minimal.

  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 a single sentence with no wasted words. It is front-loaded with the verb 'Refine' and provides the essential purpose efficiently.

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

  Completeness2/5

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

  With 4 parameters and no annotations, the one-sentence description is insufficient to fully understand tool usage. It does not explain parameter semantics, default values, or how the refined prompt should be used alongside sibling tools. Though an output schema exists, the description itself lacks enough context.

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

  Parameters1/5

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

  Schema description coverage is 0% (none of the 4 parameters are described). The description provides no parameter-level semantics, failing to explain what 'request', 'style', 'composition', or 'extra_details' mean or how they interact. Since coverage is low, the description should compensate but doesn't.

  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 'refine' and states the resource ('candy image request') and outcome ('white-background product prompt'). This clearly distinguishes it from sibling tools 'generate_candy_image' and 'remove_background'.

  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 (when you need to turn a candy request into a product prompt) but does not explicitly state when-not-to-use or mention alternative tools. No exclusions are given, so guidance is present but implied rather than explicit.

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

• remove_backgroundA
  3.6/5.0
  Behavior3/5

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

  Without annotations, the description carries the burden of disclosing behavior. It explains the transformation (background removed) and the output format (transparent WebP), and notes the input is a local image. However, it does not mention side effects like overwriting, default output behavior when output_path is null, or error conditions, leaving some 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.

  Conciseness5/5

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

  The description is a single sentence of 12 words, highly concise and front-loaded. Every word earns its place, clearly stating the action and result without redundancy.

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

  Completeness3/5

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

  Given the tool's simplicity and the presence of an output schema, the description covers the core functionality. However, it omits important operational details such as default output path behavior and whether existing files are overwritten. It is minimally complete but lacks robustness for an unannotated tool.

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

  Parameters2/5

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

  With 0% schema description coverage, the description should compensate. It clarifies that image_path refers to a local image, but it does not explain the output_path parameter at all, including its optionality or default behavior. The description adds minimal value over the raw 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 clearly states the tool's function: removing the background from a local image and saving a transparent WebP. This specific verb+resource structure distinguishes it from the sibling tools, which are about candy prompt refinement and image generation, making the purpose unambiguous.

  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 when the user wants to remove an image background, but does not explicitly state when to use it versus alternatives or mention any prerequisites. Since sibling tools are unrelated, the implied context is sufficient for basic selection, though explicit guidance is missing.

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