layer_duplicate · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What layer_duplicate does on SVG Canvas MCP

AI agents use layer_duplicate to create or update resources in SVG Canvas MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SVG Canvas MCP environment.

WHY IT NEEDS A POLICY

Why layer_duplicate needs a policy

This tool creates a duplicate copy of a layer, which is a reversible modification operation. It adds new data (a copy of an existing layer) without permanently destroying anything. This falls squarely in the Write category as it modifies the canvas state.

From the tool's definition The tool name 'layer_duplicate' and description '레이어를 복제합니다' (which translates to 'Duplicates a layer') indicates creation of new content within an SVG canvas by copying an existing layer.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

layer_duplicate Rate-limited

layer_duplicate 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "layer_duplicate": {
      "limits": [
        {
          "counter": "layer_duplicate_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SVG Canvas MCP, so you can run agents against it safely.

FAQ

Questions about layer_duplicate

What does the layer_duplicate tool do? +

레이어를 복제합니다. It is categorised as a Write tool in the SVG Canvas MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on layer_duplicate? +

Register the SVG Canvas MCP server in PolicyLayer and add a rule for layer_duplicate: 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 SVG Canvas MCP. Nothing to install.

What risk level is layer_duplicate? +

layer_duplicate is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit layer_duplicate? +

Yes. Add a rate_limit block to the layer_duplicate 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.

How do I block layer_duplicate completely? +

Set action: deny in the PolicyLayer policy for layer_duplicate. 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.

What MCP server provides layer_duplicate? +

layer_duplicate is provided by the SVG Canvas MCP server (kim62210/svg-canvas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.