extract_theme_colors

THE RISK

Low Risk

Why extract_theme_colors needs a policy

This tool retrieves color data from an existing Figma design asset (theme frame). It performs no write operations, does not delete or modify data, executes no code or scripts, and incurs no financial obligation. The most severe capability is reading design metadata, making Read the appropriate category with low severity due to limited blast radius from misuse.

From the tool's definition Tool name 'extract_theme_colors' and description 'Extract colors from a Figma theme frame' indicate data retrieval with no modification, deletion, or execution of external operations. The verb 'extract' combined with 'from' confirms query/read semantics.

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

POLICY

How to control extract_theme_colors

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

policy.json

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

extract_theme_colors 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 to Flutter MCP Server — 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

More Figma to Flutter MCP Server tools

Write export_flutter_assets Export images from Figma nodes and set up Flutter assets directory with pubspec.yaml Write export_svg_flutter_assets Export SVG assets from Figma nodes. Detects SVG content by analyzing vector percentage - n Write generate_flutter_implementation Generate complete Flutter widget code using cached style definitions Read analyze_figma_component Analyze a Figma component or component set to extract layout, styling, and structure infor Read analyze_full_screen Analyze a complete Figma screen/frame to extract layout, sections, navigation, and structu Read extract_theme_typography Extract typography styles from a Figma theme frame containing text samples with different Read inspect_component_structure Get a quick overview of component structure, children, and nested components. Use inspect_ Read inspect_screen_structure Get a quick overview of screen structure, sections, and navigation elements

All 13 Figma to Flutter MCP Server 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 extract_theme_colors

What does the extract_theme_colors tool do? +

Extract colors from a Figma theme frame containing color swatches with labels. It is categorised as a Read tool in the Figma to Flutter MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on extract_theme_colors? +

Register the Figma to Flutter MCP Server MCP server in PolicyLayer and add a rule for extract_theme_colors: 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 to Flutter MCP Server. Nothing to install.

What risk level is extract_theme_colors? +

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

Can I rate-limit extract_theme_colors? +

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

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

extract_theme_colors is provided by the Figma to Flutter MCP Server MCP server (mhmzdev/figma-flutter-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Figma to Flutter MCP Server tool call.

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

CHECK YOUR STACK →