getRegistryItem

THE RISK

Low Risk

Why getRegistryItem needs a policy

This tool retrieves pre-existing registry data about UI components. It performs a query/lookup operation without creating, modifying, deleting, or executing any code or external operations.

From the tool's definition Tool description states it 'Gets detailed information for a single Magic UI registry item' — a retrieval operation with no side effects.

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

POLICY

How to control getRegistryItem

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

policy.json

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

getRegistryItem 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 Magic UI 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 Magic UI MCP Server tools

Read listRegistryItems Lists Magic UI registry items with optional filtering by kind, query, and limit. Read searchRegistryItems Searches Magic UI registry items by keyword or use case.

All 3 Magic UI MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

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 getRegistryItem

What does the getRegistryItem tool do? +

Gets detailed information for a single Magic UI registry item. It is categorised as a Read tool in the Magic UI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on getRegistryItem? +

Register the Magic UI MCP Server MCP server in PolicyLayer and add a rule for getRegistryItem: 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 Magic UI MCP Server. Nothing to install.

What risk level is getRegistryItem? +

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

Can I rate-limit getRegistryItem? +

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

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

getRegistryItem is provided by the Magic UI MCP Server MCP server (magicuidesign/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Magic UI MCP Server tool call.

Start from Magic UI 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 →