draw_ellipse · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What draw_ellipse does on SVG Canvas MCP

AI agents use draw_ellipse 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_ellipse needs a policy

This tool creates new graphical elements (ellipses) within an SVG canvas, which constitutes data creation/modification. It is Write-category because the changes are reversible—ellipses can be removed or modified. There is no code execution, deletion, or financial impact. Severity is low because misuse only affects local SVG rendering with no external side effects or data loss risk.

From the tool's definition Tool name 'draw_ellipse' and description indicate it creates/modifies SVG graphics by drawing elliptical shapes. The server description confirms this is for 'creation and manipulation of professional-grade SVG graphics'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draw_ellipse Rate-limited

draw_ellipse 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_ellipse": {
      "limits": [
        {
          "counter": "draw_ellipse_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_ellipse

What does the draw_ellipse tool do? +

타원을 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_ellipse? +

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

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

Can I rate-limit draw_ellipse? +

Yes. Add a rate_limit block to the draw_ellipse 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_ellipse completely? +

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

draw_ellipse 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.