layer_blend_mode · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What layer_blend_mode does on SVG Canvas MCP

AI agents use layer_blend_mode 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_blend_mode needs a policy

This tool modifies layer properties (blend mode) within the SVG canvas, which is a reversible change. It does not execute arbitrary code, delete data, or cause destructive effects. Changing a blend mode is a standard graphics editing operation that can be easily undone. It falls clearly into the Write category as it creates or modifies data reversibly without side effects beyond the intended property change.

From the tool's definition Tool name 'layer_blend_mode' and description indicating it 'sets the blend mode of a layer' (translated from Korean: '레이어의 블렌드 모드를 설정합니다'). This is a modification operation on layer properties within an SVG graphics editor.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

layer_blend_mode Rate-limited

layer_blend_mode 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_blend_mode": {
      "limits": [
        {
          "counter": "layer_blend_mode_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_blend_mode

What does the layer_blend_mode tool do? +

레이어의 블렌드 모드를 설정합니다. 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_blend_mode? +

Register the SVG Canvas MCP server in PolicyLayer and add a rule for layer_blend_mode: 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_blend_mode? +

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

Can I rate-limit layer_blend_mode? +

Yes. Add a rate_limit block to the layer_blend_mode 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_blend_mode completely? +

Set action: deny in the PolicyLayer policy for layer_blend_mode. 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_blend_mode? +

layer_blend_mode 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.