Copy a rectangular region from one frame to another (same or different layer). Useful for animation workflows.
AI agents use copy_region to create or update resources in Piskel MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Piskel MCP Server environment.
This tool creates or modifies pixel art data within frames by copying regions between frames/layers. While the operation is reversible (undo-capable in typical graphics software), it does alter frame state and composition. It does not execute arbitrary code, delete data, or move money, making it a Write action. The blast radius is medium because misuse could corrupt animation frames, but damage is reversible.
From the tool's definition Tool performs 'copy_region' which modifies frame data by duplicating pixel content from one location to another. The description states it copies 'a rectangular region from one frame to another' which is a reversible data modification operation.
Documented attack patterns abuse exactly the kind of access copy_region gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Piskel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for copy_region:
{
"version": "1",
"default": "deny",
"tools": {
"copy_region": {
"limits": [
{
"counter": "copy_region_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}copy_region stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Copy a rectangular region from one frame to another (same or different layer). Useful for animation workflows. It is categorised as a Write tool in the Piskel MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Piskel MCP Server MCP server in PolicyLayer and add a rule for copy_region: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Piskel MCP Server. Nothing to install.
copy_region is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the copy_region rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for copy_region. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
copy_region is provided by the Piskel MCP Server MCP server (yafeiaa/piskel-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Piskel MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
45 Piskel MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.