Lists Magic UI registry items with optional filtering by kind, query, and limit.
AI agents call listRegistryItems to retrieve information from Magic UI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries data from a registry of UI components without creating, modifying, deleting, or executing anything. It is a standard list/search operation with no capability to alter state or trigger external operations. The low severity reflects that listing UI components poses minimal risk even in adversarial AI use.
From the tool's definition Tool name 'listRegistryItems' and description 'Lists Magic UI registry items' indicate a retrieval operation with no side effects. The parameters (filtering by kind, query, and limit) are all read-only query modifiers.
Documented attack patterns abuse exactly the kind of access listRegistryItems gives an agent:
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 listRegistryItems:
{
"version": "1",
"default": "deny",
"tools": {
"listRegistryItems": {}
}
}listRegistryItems is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Lists Magic UI registry items with optional filtering by kind, query, and limit. It is categorised as a Read tool in the Magic UI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Magic UI MCP Server MCP server in PolicyLayer and add a rule for listRegistryItems: 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.
listRegistryItems is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the listRegistryItems 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.
Set action: deny in the PolicyLayer policy for listRegistryItems. 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.
listRegistryItems 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.
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.
Free to start. No card required.
3 Magic UI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.