convert_color

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states what the tool does but doesn't describe how it behaves: it doesn't mention error handling (e.g., for invalid inputs), output format, or any constraints like rate limits or permissions. For a tool with no annotations, this leaves significant gaps in understanding its operational traits.

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 extremely concise and front-loaded: 'Convert between color formats (hex, RGB, HSL)' is a single, efficient sentence that directly states the purpose with zero waste. Every word earns its place, making it easy to parse and understand quickly.

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 (3 parameters, no nested objects) and the absence of annotations and output schema, the description is minimally adequate. It covers the basic function but lacks details on behavior, error handling, and output format, which are important for a conversion tool. It's complete enough to understand what it does but not how it works fully.

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?

The schema description coverage is 100%, with clear descriptions for all three parameters ('input', 'from', 'to') and enums for 'from' and 'to'. The description adds minimal value beyond the schema by listing the formats (hex, RGB, HSL), but it doesn't provide additional context like examples or edge cases. Given the high schema coverage, a baseline score of 3 is appropriate.

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: 'Convert between color formats (hex, RGB, HSL)'. It specifies the action (convert) and the resources involved (color formats), making the function immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'convert_timezone' beyond the domain difference, which is why it doesn't reach a perfect score.

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 no guidance on when to use this tool versus alternatives. It doesn't mention any prerequisites, limitations, or comparisons to other tools in the server (e.g., when to choose this over other conversion tools like 'convert_timezone'). The usage is implied by the purpose but lacks explicit context or exclusions.

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