rgb_to_hsl

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

No annotations are provided, so the description carries the burden of behavioral disclosure. It does disclose the cost ($0.001 USDC via x402), which is a significant behavioral trait. However, it does not mention return format, error handling, or any other side effects. For a simple conversion tool, the cost disclosure is useful but limited.

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 very short and front-loaded, with 'rgb to hsl' in the first few words. It contains only two sentences and no fluff. However, 'Colors & Design tool' is somewhat generic and could be more illustrative, but overall it is efficient.

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 simplicity, the description still falls short. It does not specify the required input format (e.g., separate RGB channels, hex string) or the output format (e.g., HSL values as integers or percentages). The schema provides no help because it only has a generic 'params' wrapper. The cost note is useful but does not compensate for the lack of input/output details.

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 input schema only has a generic 'params' object with no specific parameter definitions, and the description does not mention parameters at all. There is no guidance on how to provide RGB values (e.g., integers, hex string, ranges). This is a critical gap because the agent cannot correctly construct a call without understanding the expected parameter structure.

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 name 'rgb_to_hsl' clearly indicates a color conversion from RGB to HSL, and the description adds 'Colors & Design tool' to reinforce its domain. However, the description does not explicitly state the conversion action, relying on the name to imply it. This is clear enough to distinguish from siblings like hex_to_hsl, but could be more explicit.

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 other color conversion tools (e.g., hex_to_hsl, hsl_to_rgb). It only labels it as a 'Colors & Design tool', which is too vague to help an agent decide between alternatives. There is no mention of input formats or use cases.

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