Convert RGB values (0-255) into a hex color string for CSS, design, or code.
Convert RGB color values (0-255) to a hex color string.
| Name | Required | Description | Default |
|---|---|---|---|
| b | Yes | ||
| g | Yes | ||
| r | Yes |
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |
Changes observed during successful MCP inspections.
v1.0.4Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the disclosure burden. It usefully adds the accepted input range (0-255) and the output type (hex string), confirming this is a pure, side-effect-free conversion. However, it does not state what happens with out-of-range inputs (e.g. r=300) or the exact output format (case, leading '#').
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?
A single tight sentence that is front-loaded with the operation and ends with the concrete range and output type. No filler.
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?
An output schema exists, so return values need not be explained. For a simple pure conversion the description covers input range and output type adequately; the only minor gap is edge-case behavior for invalid inputs.
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 description coverage is 0%, so the description must compensate. It clarifies that the parameters represent RGB components each in the 0-255 range, adding genuine meaning over the bare r/g/b integer schema, but it does not explicitly map each parameter (r=red, g=green, b=blue).
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?
States a specific verb (Convert) plus the source and target resources (RGB color values to a hex color string), and the stated direction inherently distinguishes it from its inverse sibling conversion_hex_to_rgb. An agent can select it without opening the schema.
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 when-to-use or when-not-to-use is given, but for a stateless pure conversion utility the usage is implied by the function itself. Adequate but with no exclusions or routing guidance relative to conversion_hex_to_rgb.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.