draw_star · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What draw_star does on SVG Canvas MCP

AI agents use draw_star 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_star needs a policy

draw_star creates or modifies SVG canvas content by adding a star shape element. This is a reversible write operation—the drawn element can be modified, moved, or deleted. It has no side effects beyond the canvas itself, does not execute arbitrary code, and does not delete or overwrite data irreversibly.

From the tool's definition Tool creates SVG graphics (star shape drawing) as part of SVG Canvas MCP server described as enabling 'creation and manipulation of professional-grade SVG graphics'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draw_star Rate-limited

draw_star 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_star": {
      "limits": [
        {
          "counter": "draw_star_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_star

What does the draw_star tool do? +

별 모양을 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_star? +

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

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

Can I rate-limit draw_star? +

Yes. Add a rate_limit block to the draw_star 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_star completely? +

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

draw_star 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.