generateHTML · Figma MCP Server MCP: Risk & Policy

WHAT IT DOES

What generateHTML does on Figma MCP Server

AI agents use generateHTML 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 generateHTML needs a policy

The tool creates/generates new HTML code from Figma design nodes. While the generated HTML is typically output for developer use and doesn't directly modify Figma or underlying systems, it is a content creation action that could produce code artifacts.

From the tool's definition Tool name 'generateHTML' and description 'Generate HTML structure from a Figma node' indicates creation of new code artifacts from design data. This is a Write operation that produces new content (HTML code) based on design input.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generateHTML Rate-limited

generateHTML 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": {
    "generateHTML": {
      "limits": [
        {
          "counter": "generatehtml_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 generateHTML

What does the generateHTML tool do? +

Generate HTML structure from a Figma node. 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 generateHTML? +

Register the Figma MCP Server MCP server in PolicyLayer and add a rule for generateHTML: 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 generateHTML? +

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

Can I rate-limit generateHTML? +

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

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

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