flatten_node · Claude Talk to Figma MCP: Risk & Policy

WHAT IT DOES

What flatten_node does on Claude Talk to Figma MCP

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

WHY IT NEEDS A POLICY

Why flatten_node needs a policy

The tool modifies Figma design elements by flattening node hierarchies and converting vector shapes. This is a Write operation because it transforms and updates data structures within a design document. The change is reversible (can be undone in Figma), so it does not qualify as Destructive.

From the tool's definition 'Flatten a node in Figma (e.g., for boolean operations or converting to path)' — modifies design elements by converting grouped/structured nodes into flattened paths or merged geometry, which is a reversible transformation of existing design data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

flatten_node Rate-limited

flatten_node 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": {
    "flatten_node": {
      "limits": [
        {
          "counter": "flatten_node_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 Claude Talk to Figma MCP, so you can run agents against it safely.

FAQ

Questions about flatten_node

What does the flatten_node tool do? +

Flatten a node in Figma (e.g., for boolean operations or converting to path). It is categorised as a Write tool in the Claude Talk to Figma 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 flatten_node? +

Register the Claude Talk to Figma MCP server in PolicyLayer and add a rule for flatten_node: 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 Claude Talk to Figma MCP. Nothing to install.

What risk level is flatten_node? +

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

Can I rate-limit flatten_node? +

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

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

flatten_node is provided by the Claude Talk to Figma MCP server (stranyer/claude-mcp-figma). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.