set_physics_properties

Set physics properties on a Blueprint component.

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/set-physics-properties.md

WHAT IT DOES

What set_physics_properties does on Unreal-MCP

AI agents use set_physics_properties 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 set_physics_properties is rated Medium

This tool modifies physics properties of a Blueprint component, which creates or updates configuration in the editor without deleting or irreversibly destroying data. The changes can be undone through typical editor undo functionality.

From the tool's definition Tool name 'set_physics_properties' and description 'Set physics properties on a Blueprint component' indicate modification of component properties in Unreal Engine editor.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_physics_properties 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 set_physics_properties, this is the rule to start with:

set_physics_properties Rate-limited

set_physics_properties 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": {
    "set_physics_properties": {
      "limits": [
        {
          "counter": "set_physics_properties_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 set_physics_properties call is checked against it from then on.

FAQ

Questions about set_physics_properties

What does the set_physics_properties tool do? +

Set physics properties on a Blueprint component. 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 set_physics_properties? +

Register the Unreal MCP server in PolicyLayer and add a rule for set_physics_properties: 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 set_physics_properties? +

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

Can I rate-limit set_physics_properties? +

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

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

set_physics_properties 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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