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Aseprite MCP Tools

Aseprite MCP Tools

by ZeroTian
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Remote

apply_palette_preset

Apply a retro palette preset (gameboy, pico8, etc.) to an Aseprite file. Existing colors remain; use quantize_to_palette to snap pixels.

Instructions

Set the sprite palette to a built-in retro preset.

This only sets the palette; existing pixels keep their colors. Use quantize_to_palette afterwards to snap pixels to the new palette.

Args: filename: Aseprite file to modify preset: One of: gameboy, monochrome, grayscale_4, cga, pico8, c64, dawnbringer16, dawnbringer32

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "filename": "<filename>",
      "preset": "<preset>"
    },
    "name": "apply_palette_preset"
  }
}

Input Schema

NameRequiredDescriptionDefault
filenameYes
presetYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A4.7/5.0
Behavior4/5

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

No annotations are provided, so the description carries the burden. It discloses that the tool only sets the palette and does not modify existing pixels, which is key behavioral info. It does not detail permissions, reversibility, or file format requirements, but for a simple palette-setting operation, the disclosure is adequate.

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, starting with the core purpose, then clarifying what it does not do, providing a usage tip, and listing parameters. Every sentence adds value with no wasted words.

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?

Given the tool's simplicity (2 simple params, no output schema), the description covers all needed aspects: purpose, behavior, parameter options, and usage context. It fully enables an agent to select and invoke the tool correctly.

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

Parameters4/5

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

The input schema has 0% description coverage, so the description adds value by listing the preset options and explaining that filename is the file to modify. This provides semantic meaning beyond the schema's property names.

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 it sets the sprite palette to a built-in retro preset. It distinguishes from sibling tools like quantize_to_palette by explicitly noting it only sets the palette and does not change existing pixel colors.

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

Usage Guidelines5/5

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

The description provides explicit guidance on when to use this tool and when not: it only sets the palette, and recommends using quantize_to_palette if pixel snapping is needed. It also lists the available preset options in the Args section, helping the agent choose the correct parameter.

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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