draw_line · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What draw_line does on SVG Canvas MCP

AI agents use draw_line 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_line needs a policy

This tool creates new SVG content (a line element) which is a reversible modification of the canvas state. It does not execute arbitrary code, delete data, or trigger external operations—it simply adds a visual element to a graphic. This fits the Write category: creates or modifies data reversibly.

From the tool's definition Tool is named 'draw_line' and belongs to an SVG Canvas MCP server for creating and manipulating SVG graphics. The description '직선을 그립니다' (Korean: 'draws a line') indicates it creates or adds graphical elements to an SVG canvas.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

draw_line Rate-limited

draw_line 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_line": {
      "limits": [
        {
          "counter": "draw_line_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_line

What does the draw_line tool do? +

직선을 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_line? +

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

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

Can I rate-limit draw_line? +

Yes. Add a rate_limit block to the draw_line 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_line completely? +

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

draw_line 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.