set_component_description · Figma Copilot MCP: Risk & Policy

WHAT IT DOES

What set_component_description does on Figma Copilot

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

WHY IT NEEDS A POLICY

Why set_component_description needs a policy

An AI agent can call set_component_description faster than any human can review — one bad instruction and it creates or modifies resources in Figma Copilot by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_component_description Rate-limited

set_component_description 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": {
    "set_component_description": {
      "limits": [
        {
          "counter": "set_component_description_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 Copilot, so you can run agents against it safely.

FAQ

Questions about set_component_description

What does the set_component_description tool do? +

Set the description of a component with Markdown formatting support. It is categorised as a Write tool in the Figma Copilot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_component_description? +

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

What risk level is set_component_description? +

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

Can I rate-limit set_component_description? +

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

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

set_component_description is provided by the Figma Copilot MCP server (xlzuvekas/figma-copilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.