figma_import_style_by_key · Figma Unified MCP: Risk & Policy

WHAT IT DOES

What figma_import_style_by_key does on Figma Unified

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

WHY IT NEEDS A POLICY

Why figma_import_style_by_key needs a policy

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

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

figma_import_style_by_key Rate-limited

figma_import_style_by_key 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": {
    "figma_import_style_by_key": {
      "limits": [
        {
          "counter": "figma_import_style_by_key_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 Unified, so you can run agents against it safely.

FAQ

Questions about figma_import_style_by_key

What does the figma_import_style_by_key tool do? +

Import library styles by key so they become available locally. Use figma_get_styles to find keys. Supports batch import via styleKeys array. After import, styles can be applied with figma_apply_style by name. It is categorised as a Write tool in the Figma Unified MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on figma_import_style_by_key? +

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

What risk level is figma_import_style_by_key? +

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

Can I rate-limit figma_import_style_by_key? +

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

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

figma_import_style_by_key is provided by the Figma Unified MCP server (sso-ss/figma-unified-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.