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aseprite-mcp

aseprite-mcp

by baichuan4167-lang
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JavaScript
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aseprite_frames_from_grids

Create multi-frame animations by providing one character grid per frame; each grid is written into its own frame on a single layer.

Instructions

Draw a whole animation in one call: pass one character grid per frame and the tool writes each grid into its own frame. This is the fastest, most token-efficient way to produce a multi-frame animation. Grids are applied on a single layer; use x/y to offset them.

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": {
      "grids": "<grids>"
    },
    "name": "aseprite_frames_from_grids"
  }
}

Input Schema

NameRequiredDescriptionDefault
xNoLeft edge for every grid (default 0).
yNoTop edge for every grid (default 0).
keyNoCharacter-to-colour map. "." means transparent.
gridsYesOne grid (array of character rows) per frame.
layerNoTarget layer (all frames are drawn on it).
documentNoDocument to act on: a short name inside the art folder ("hero"), a relative path, or an absolute .aseprite path. Omit to use the active document.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.4/5.0
Behavior2/5

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

With no annotations, the description carries the full behavioral burden, and it leaves key mutation semantics unstated: whether existing frames are overwritten or new frames created, whether the document is modified destructively, and what permissions/state are required. The single-layer constraint is useful, but the overwrite/create ambiguity is a real gap for a write tool.

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

Conciseness4/5

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

Three sentences, front-loaded with the core action and rationale, with no filler. The efficiency claim is somewhat promotional but functions as usage guidance, so little is wasted.

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

Completeness3/5

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

For a 6-parameter mutation tool with no annotations and no output schema, the description explains the main workflow but omits frame-creation/overwrite semantics and any indication of what the call returns or how failures surface. Adequate but with clear gaps.

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

Parameters3/5

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

Schema coverage is 100%, so the parameters are already documented, and the description only restates the x/y offset and single-layer behavior. Baseline 3 applies since the schema does the heavy lifting and the description adds no syntax or format detail beyond it.

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

Purpose4/5

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

The description gives a specific verb and resource: draw an entire animation by mapping one character grid to one frame. It is clearly distinguishable from single-draw siblings like aseprite_draw or aseprite_draw_across_frames, but it never names them, so sibling differentiation is left implicit.

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?

It states the positive condition well — 'the fastest, most token-efficient way to produce a multi-frame animation' tells the agent to reach for this when animating wholesale rather than drawing frames one at a time. It offers no explicit exclusions or named alternatives, but the context is clear.

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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