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ZeroTian

Aseprite MCP Tools

by ZeroTian

copy_frame

Copy all cels from a source frame to a target frame in an Aseprite sprite, with options to overwrite or append.

Instructions

Copy all cels from a source frame to a target frame (or append).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
filenameYes
source_frameYes
target_frameNo
overwriteNo
Behavior3/5

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

Discloses core behavior (copy all cels, option to append), but doesn't explain what happens to existing cels, how overwrite works, or the effect of target_frame being null. No annotations, so description carries full burden but is minimal.

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?

Single sentence with no wasted words. Front-loaded with key action and resource.

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?

With 4 parameters and no output schema, the description is too brief. It does not explain what 'append' means, how target_frame default null behaves, or if the tool creates frames. Lacks completeness for safe usage.

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%, and the description does not explain any parameters. 'filename', 'source_frame', 'target_frame', and 'overwrite' are not described. The phrase 'or append' hints at target_frame behavior but is insufficient.

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?

Clearly states it copies all cels from source to target frame, with append option. Distinguishes from sibling 'copy_cel' which copies a single cel.

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 this tool versus alternatives like copy_cel or add_frame. Does not explain prerequisites or context.

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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