create_effect_style

THE RISK

Medium Risk

Why create_effect_style needs a policy

This tool creates new reusable style assets in Figma rather than querying data (Read) or executing arbitrary code (Execute). The creation of effect styles is a reversible design operation—these styles can be edited or deleted without irreversible consequences. While it modifies the design file, it does not destructively delete data, execute external operations, or involve financial transactions.

From the tool's definition Tool name 'create_effect_style' and description 'Create a reusable effect style' indicates creation of new design assets (shadows, blurs) in Figma, which are reversible modifications to the design file.

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

POLICY

How to control create_effect_style

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_effect_style": {
      "limits": [
        {
          "counter": "create_effect_style_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create_effect_style 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.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Claude Talk to Figma MCP tools

Destructive delete_node Delete a node from Figma Destructive delete_page Delete a page from the current Figma document Execute load_font_async Load a font asynchronously in Figma Write apply_image_transform Adjust image position, scale, and rotation within node. Rotates the IMAGE inside the node, Write apply_variable_to_node Bind a variable to a node property in Figma. Call once per field — for multiple fields, ca Write boolean_operation Perform a boolean operation (union, subtract, intersect, exclude) on two or more nodes. Al Write clone_node Clone an existing node in Figma Write convert_to_frame Convert a group or shape node into a frame in Figma. Preserves position, size, visual prop

All 93 Claude Talk to Figma MCP tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_effect_style

What does the create_effect_style tool do? +

Create a reusable effect style (shadows, blurs) 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 create_effect_style? +

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

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

Can I rate-limit create_effect_style? +

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

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

create_effect_style is provided by the Claude Talk to Figma MCP server (arinspunk/claude-talk-to-figma-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Talk to Figma MCP tool call.

Start from Claude Talk to Figma MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →