set_line_height · Claude Talk to Figma MCP: Risk & Policy

WHAT IT DOES

What set_line_height does on Claude Talk to Figma MCP

AI agents use set_line_height 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_line_height needs a policy

This tool creates or modifies design data reversibly within Figma. Changing line height is a style modification that can be undone (consistent with Write category). While it affects the design, it does not delete data (not Destructive), execute arbitrary code (not Execute), or trigger financial transactions (not Financial).

From the tool's definition Tool modifies a text node's line height property in Figma, which changes the document's design state. Description states 'Set the line height' indicating a mutating operation on existing design elements.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_line_height Rate-limited

set_line_height 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_line_height": {
      "limits": [
        {
          "counter": "set_line_height_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_line_height

What does the set_line_height tool do? +

Set the line height 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_line_height? +

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

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

Can I rate-limit set_line_height? +

Yes. Add a rate_limit block to the set_line_height 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_line_height completely? +

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

set_line_height 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.