create_line · Figma MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_line does on Figma MCP Server

AI agents use create_line 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_line needs a policy

Creating a line in Figma is a reversible write operation that modifies a design file by adding a new shape element. It does not delete data (not Destructive), execute arbitrary code (not Execute), or commit financial obligations (not Financial). While the description is empty (lowering confidence slightly), the tool name and sibling context strongly indicate it creates design artifacts, fitting the Write category.

From the tool's definition Tool named 'create_line' on Figma MCP Server, with sibling tools like 'create_rectangle', 'create_circle', 'create_arc', 'create_polygon', and 'create_frame_in_figma' that all create/modify design objects.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_line Rate-limited

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

FAQ

Questions about create_line

What does the create_line tool do? +

create_line. 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_line? +

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

What risk level is create_line? +

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

Can I rate-limit create_line? +

Yes. Add a rate_limit block to the create_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 create_line completely? +

Set action: deny in the PolicyLayer policy for create_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 create_line? +

create_line 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.