chart_pie · SVG Canvas MCP: Risk & Policy

WHAT IT DOES

What chart_pie does on SVG Canvas MCP

AI agents use chart_pie 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 chart_pie needs a policy

The tool generates/creates visual content (a pie chart) within the SVG canvas, which is a write operation that adds or modifies the drawing. It does not read existing data, execute arbitrary code, delete anything, or involve financial operations. The blast radius of misuse is minimal—at worst an agent creates unwanted chart graphics that can be easily undone via standard undo/editing operations.

From the tool's definition Tool creates a pie chart graphic ('파이 차트를 생성합니다' translates to 'Creates a pie chart'). This is a data visualization creation action that modifies the canvas by adding a new graphic element.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chart_pie Rate-limited

chart_pie 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": {
    "chart_pie": {
      "limits": [
        {
          "counter": "chart_pie_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 chart_pie

What does the chart_pie tool do? +

파이 차트를 생성합니다. 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 chart_pie? +

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

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

Can I rate-limit chart_pie? +

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

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

chart_pie 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.