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generate_color_ramp

Produces a color ramp from dark to light using hue-shifting, where shadows are cooler and highlights warmer. Ideal for pixel art shading.

Instructions

Generate a shading ramp (dark to light) from a base color.

Produces the standard pixel-art shading technique of hue-shifting: shadows lean cooler (hue shifted one way), highlights lean warmer. Use the returned colors for shading instead of plain darker/lighter versions of the same hue.

Args: base_color: Hex color the ramp is built around, e.g. "#D04648" steps: Number of colors in the ramp, 2-16 (default 5) hue_shift_degrees: Total hue rotation across the ramp (default 20) lightness_range: Total lightness span across the ramp, 0-1 (default 0.5)

Returns: JSON array of hex colors ordered darkest to lightest.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
stepsNo
base_colorYes
lightness_rangeNo
hue_shift_degreesNo
Behavior5/5

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

With no annotations provided, the description fully explains the behavioral traits: shadows lean cooler, highlights lean warmer, and the output is ordered darkest to lightest. It also describes the effect of parameters like hue_shift_degrees and lightness_range. This is comprehensive for a pure generation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise and well-structured: a one-sentence summary, an explanation of the technique, usage guidance, and a parameter list. Every sentence adds value, and the information is front-loaded appropriately.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 4 parameters and no output schema, the description is complete. It describes the input parameters, the algorithm (hue-shifting), and the output format (JSON array of hex colors, darkest to lightest). No additional information is needed for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0% description coverage, but the tool's 'Args' section in the description provides detailed explanations for all four parameters, including ranges, defaults, and meaning (e.g., base_color is a hex color, steps is 2-16, etc.). This adds substantial meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool generates a shading ramp from a base color using hue-shifting, a standard pixel-art technique. It distinguishes from simple darkening by explaining the hue-shift behavior. There are no sibling tools with similar functionality, so it is unique.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description advises using the returned colors for shading instead of plain darker/lighter versions of the same hue, providing a clear context and reason for use. It does not explicitly mention alternative tools by name, but the guidance is specific enough for an agent to understand when to apply this tool.

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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