resolve_variable

THE RISK

Low Risk

Why resolve_variable needs a policy

This tool retrieves the current value of a Figma variable given its ID. It is a read/query operation with no side effects — it does not modify, create, or delete anything.

From the tool's definition Resolve a Figma variable by ID to get its current value

Documented attack patterns abuse exactly the kind of access resolve_variable gives an agent:

POLICY

How to control resolve_variable

PolicyLayer is an MCP gateway — it sits between your AI agents and Figma AI Bridge, and nothing reaches the server without passing your rules. This is the rule we recommend for resolve_variable:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "resolve_variable": {}
  }
}

resolve_variable is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Figma AI Bridge — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 64 Figma AI Bridge tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about resolve_variable

What does the resolve_variable tool do? +

Resolve a Figma variable by ID to get its current value. It is categorised as a Read tool in the Figma AI Bridge MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on resolve_variable? +

Register the Figma AI Bridge MCP server in PolicyLayer and add a rule for resolve_variable: 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 AI Bridge. Nothing to install.

What risk level is resolve_variable? +

resolve_variable is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit resolve_variable? +

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

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

resolve_variable is provided by the Figma AI Bridge MCP server (renfei-design/figma_ai_bridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Figma AI Bridge tool call.

Start from Figma AI Bridge, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →