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ZeroTian

Aseprite MCP Tools

by ZeroTian

draw_path

Draw a polyline path on a specified layer and frame in an Aseprite file, with custom color and thickness.

Instructions

Draw a path using a polyline on a specific layer/frame.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
filenameYes
layer_nameYes
frame_indexYes
pointsYes
colorNo#000000
thicknessNo
create_if_missingNo
Behavior2/5

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

No annotations are provided, so the description carries full burden. It mentions drawing on a specific layer/frame but does not clarify behavior when layer/frame is missing (despite create_if_missing parameter), whether it overwrites or appends, or any side effects like modification of existing content.

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

Conciseness3/5

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

The single-sentence description is concise but under-specifies; it is not overloaded but lacks necessary detail for a tool with 7 parameters.

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

Completeness2/5

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

Given no output schema, 7 parameters, and many sibling tools, the description is incomplete. It does not explain return values, error behavior, or how the tool interacts with existing drawing or animation state.

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

Parameters1/5

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

Schema description coverage is 0%, yet the description provides no explanation of parameters (filename, layer_name, frame_index, points, color, thickness, create_if_missing). The agent must rely solely on parameter names and types, which is insufficient for correct usage.

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 clearly states the verb 'Draw' and resource 'path using a polyline on a specific layer/frame,' which distinguishes it from other drawing tools like draw_circle or draw_line. However, it could be more precise about whether 'path' means a continuous polyline.

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

Usage Guidelines2/5

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

No guidance on when to use draw_path vs alternatives such as draw_line, draw_polygon, or draw_pixels. Lacks context for selection among many similar sibling tools.

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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