hex_to_hsl

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

The description discloses the cost ($0.001 USDC via x402), which is useful operational context. However, with no annotations, it fails to disclose other behavioral traits such as accepted hex formats, return value structure, or side effects, leaving most behavior undisclosed.

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 brief and front-loaded with the name and category, and the cost detail is a relevant addition. However, it is so under-specified that it sacrifices essential information, though it is not verbose.

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?

For a simple conversion tool, the name suggests the purpose, but the lack of parameter documentation and behavioral details creates significant gaps. The cost is mentioned, but input/output specifications are absent, making the completion insufficient for reliable invocation.

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 provides a generic 'params' object with no meaningful properties, and the description adds no parameter names, examples, or types. The actual arguments required for conversion are completely undocumented, making invocation ambiguous.

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 'hex to hsl — Colors & Design tool' essentially restates the tool name and adds a broad category. It does not explicitly state the conversion action or differentiate from sibling tools like hex_to_hsv or convert_color, making it a tautology.

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?

No guidance is provided on when to use this tool versus alternatives. There is no mention of input formats, expected use cases, or exclusions, leaving the agent without decision support.

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