Hex To Rgb: Convert a hex color to RGB. 🆓 5 free trial calls per signed wallet
This tool declares no required parameters. Add optional parameters from the input schema as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {},
"name": "x402-hex-to-rgb"
}
}| Name | Required | Description | Default |
|---|---|---|---|
| hex | No | ||
| color | No |
Changes observed during successful MCP inspections.
Input schema / properties / color / descriptionRemoved value: -"Color to process"Input schema / properties / hex / descriptionRemoved value: -"Hex to process"Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It discloses that calls are metered against a signed wallet, which is genuinely useful, but says nothing about accepted input formats (leading '#', 3-digit shorthand, 8-digit alpha), output shape, or failure behavior for malformed hex.
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?
Two short sentences, front-loaded with the actual function before the trial-call note. Nothing is padded, though the name-to-description echo ('Hex To Rgb: Convert a hex color to RGB') is slightly redundant.
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 trivially simple conversion tool this could be nearly complete, but the unexplained duplicate parameters and the absence of both annotations and an output schema leave an agent guessing which field to populate and what comes back. The description should at minimum clarify input format and the hex/color distinction.
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 0% and the two parameters ('hex' and 'color') are both optional with no descriptions, leaving their relationship completely ambiguous — are they aliases, alternatives, or does one override the other? The description does not resolve this at all.
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 states a specific verb and resource: 'Convert a hex color to RGB', which is enough for an agent to know exactly what the tool does. It does not distinguish itself from adjacent siblings such as x402-rgb-to-hex, x402-hex-to-hsl, or x402-color-converter, so the agent must rely on the name alone to route correctly.
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?
There is no guidance on when to use this versus the inverse (x402-rgb-to-hex) or a general converter (x402-color-converter), and no stated preconditions. The '5 free trial calls per signed wallet' note is billing context, not usage guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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