set_effects · Claude Talk to Figma MCP: Risk & Policy

WHAT IT DOES

What set_effects does on Claude Talk to Figma MCP

AI agents use set_effects 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_effects needs a policy

This tool modifies visual effects (shadows, blurs, glows, etc.) applied to design nodes. Such changes are reversible—effects can be removed or adjusted by subsequent calls to the same tool. This is characteristic of Write operations (update/modify) rather than Read (which would only inspect effects), Execute (which would trigger external operations), or Destructive (which would permanently delete data).

From the tool's definition Tool name 'set_effects' and description 'Set the visual effects of a node in Figma' indicate modification of design element properties.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_effects Rate-limited

set_effects 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_effects": {
      "limits": [
        {
          "counter": "set_effects_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_effects

What does the set_effects tool do? +

Set the visual effects of a 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_effects? +

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

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

Can I rate-limit set_effects? +

Yes. Add a rate_limit block to the set_effects 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_effects completely? +

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

set_effects 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.