draw_circle · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What draw_circle does on SVG Canvas MCP

AI agents use draw_circle 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 draw_circle needs a policy

This tool creates new SVG circle elements, which is a reversible write operation. Users can modify or delete the circle afterward. It has no destructive, financial, or code execution implications. The blast radius is minimal—misuse would only result in unwanted circles in an SVG canvas, which can be easily undone.

From the tool's definition Tool name 'draw_circle' and context of SVG Canvas MCP server for 'creation and manipulation of professional-grade SVG graphics' indicates this tool creates or modifies SVG content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draw_circle Rate-limited

draw_circle 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": {
    "draw_circle": {
      "limits": [
        {
          "counter": "draw_circle_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 draw_circle

What does the draw_circle tool do? +

원을 그립니다. 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 draw_circle? +

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

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

Can I rate-limit draw_circle? +

Yes. Add a rate_limit block to the draw_circle 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 draw_circle completely? +

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

draw_circle 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.