set_font_name · Claude Talk to Figma MCP: Risk & Policy

WHAT IT DOES

What set_font_name does on Claude Talk to Figma MCP

AI agents use set_font_name 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 set_font_name needs a policy

This tool modifies existing design elements in Figma by changing text node formatting. While changes can be undone through Figma's undo mechanism and represent standard design operations, the modification of design artifacts justifies Write classification.

From the tool's definition Tool description states it 'Set[s] the font name and style of a text node in Figma' — this modifies a design element's properties but is reversible.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_font_name Rate-limited

set_font_name 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_font_name": {
      "limits": [
        {
          "counter": "set_font_name_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 set_font_name

What does the set_font_name tool do? +

Set the font name and style of a text node in Figma. 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 set_font_name? +

Register the Claude Talk to Figma MCP server in PolicyLayer and add a rule for set_font_name: 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 set_font_name? +

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

Can I rate-limit set_font_name? +

Yes. Add a rate_limit block to the set_font_name 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_font_name completely? +

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

set_font_name 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.