create_niagara_system

Create a new Niagara System asset.

SERVERUnreal-MCP SOURCEaadeshrao123/unreal-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aadeshrao123-unreal-mcp/create-niagara-system.md

WHAT IT DOES

What create_niagara_system does on Unreal-MCP

AI agents use create_niagara_system to create or update resources in Unreal-MCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Unreal-MCP environment.

RISK

Why create_niagara_system is rated Medium

This tool creates a new Niagara VFX system asset in Unreal Engine 5. Creating assets is a reversible Write operation — the asset can be deleted or replaced. It does not execute arbitrary code, delete existing assets, move financial resources, or have destructive side effects.

From the tool's definition Tool name and description: "Create a new Niagara System asset" — the verb 'create' and 'new' directly indicate creation of game engine assets.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_niagara_system safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Unreal-MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_niagara_system, this is the rule to start with:

create_niagara_system Rate-limited

create_niagara_system 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": {
    "create_niagara_system": {
      "limits": [
        {
          "counter": "create_niagara_system_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Unreal-MCP, apply this rule, and every create_niagara_system call is checked against it from then on.

FAQ

Questions about create_niagara_system

What does the create_niagara_system tool do? +

Create a new Niagara System asset. It is categorised as a Write tool in the Unreal-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_niagara_system? +

Register the Unreal MCP server in PolicyLayer and add a rule for create_niagara_system: 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 Unreal-MCP. Nothing to install.

What risk level is create_niagara_system? +

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

Can I rate-limit create_niagara_system? +

Yes. Add a rate_limit block to the create_niagara_system 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_niagara_system completely? +

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

create_niagara_system is provided by the Unreal MCP server (aadeshrao123/unreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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