cn402_folk_lucky-color

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

Discloses a payment requirement ('Price: unknown on Base (auto-paid in USDC)'), which is important. However, with no annotations, it lacks details about error handling, output format, or any side effects beyond the basic algorithm.

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 includes many redundant keywords and translations (e.g., '个人幸运颜色', 'Chinese Feng Shui colors') which clutter the core message. It could be more concise.

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?

No output schema, and the description does not specify what the tool returns (e.g., color names, codes). The price mention is vague ('unknown'). The agent lacks enough context to fully interpret the result.

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?

Schema coverage is 100% with a single parameter 'birth' described as 'Birth date YYYY-MM-DD'. The description adds context about Five Elements but does not add new semantic details beyond the schema.

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 'Determine personal lucky and unlucky colors from birth date based on Five Elements (Wu Xing) compatibility.' It uses a specific verb and resource, and distinguishes itself from siblings like 'cn402_folk_lucky-number' by focusing on colors.

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 explicit guidance on when to use this tool versus alternatives. Among many folk tools, there is no mention of when to choose lucky-color over lucky-number or other BaZi tools.

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