create_polygon · Figma MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_polygon does on Figma MCP Server

AI agents use create_polygon to create or update resources in Figma MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Figma MCP Server environment.

WHY IT NEEDS A POLICY

Why create_polygon needs a policy

Creating shapes in Figma is a Write operation—it modifies the document by adding new objects, but the change is reversible (polygons can be deleted). Severity is medium because unintended polygon creation could clutter a design, but the impact is limited to a single file and easily undone. Confidence is reduced to 0.75 due to the empty description, though the context and naming convention are clear.

From the tool's definition Tool name is 'create_polygon' in a Figma MCP server context. Sibling tools include create_arc, create_circle, create_frame_in_figma, create_line, create_rectangle, all of which create graphical objects in Figma documents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_polygon Rate-limited

create_polygon 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": {
    "create_polygon": {
      "limits": [
        {
          "counter": "create_polygon_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 Figma MCP Server, so you can run agents against it safely.

FAQ

Questions about create_polygon

What does the create_polygon tool do? +

create_polygon. It is categorised as a Write tool in the Figma MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_polygon? +

Register the Figma MCP Server MCP server in PolicyLayer and add a rule for create_polygon: 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 Figma MCP Server. Nothing to install.

What risk level is create_polygon? +

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

Can I rate-limit create_polygon? +

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

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

create_polygon is provided by the Figma MCP Server MCP server (sichang824/mcp-figma). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.