set_preset_property

Set a property value exposed via a Remote Control Preset.

SERVERUnreal SOURCE@jjpxdev/unreal-mcp

Medium RISK CLASS

Category Write

Parameters 32 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/jjpxdev-unreal-mcp/set-preset-property.md

WHAT IT DOES

What set_preset_property does on Unreal

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

Parameter	Type	Required	Description
`value`	object	—	Property value to set
`preset_name`	string	Yes	Preset name
`property_name`	string	Yes	Exposed property name

Parameters from the server's own tool schema.

RISK

Why set_preset_property is rated Medium

This tool modifies properties in Unreal Engine via Remote Control Presets, which are configuration mechanisms that expose engine properties for external manipulation. While the modification is reversible (properties can be set back to previous values), it affects engine state and can have significant consequences depending on which properties are modified - from rendering settings to gameplay logic.

From the tool's definition Tool name and description: 'set_preset_property' - 'Set a property value exposed via a Remote Control Preset.' The verb 'Set' indicates modification of data/properties in Unreal Engine.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_preset_property safely

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

set_preset_property Rate-limited

set_preset_property 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_preset_property": {
      "limits": [
        {
          "counter": "set_preset_property_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, apply this rule, and every set_preset_property call is checked against it from then on.

FAQ

Questions about set_preset_property

What does the set_preset_property tool do? +

Set a property value exposed via a Remote Control Preset. It is categorised as a Write tool in the Unreal MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does set_preset_property accept? +

set_preset_property accepts 3 parameters: value, preset_name, property_name. Required: preset_name, property_name. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on set_preset_property? +

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

What risk level is set_preset_property? +

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

Can I rate-limit set_preset_property? +

Yes. Add a rate_limit block to the set_preset_property 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_preset_property completely? +

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

set_preset_property is provided by the Unreal MCP server (@jjpxdev/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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