add_statetree_parameter

Add a tree-level parameter.

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/add-statetree-parameter.md

WHAT IT DOES

What add_statetree_parameter does on Unreal-MCP

AI agents use add_statetree_parameter 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 add_statetree_parameter is rated Medium

This tool creates or modifies StateTree data structures by adding parameters. It is a reversible operation (parameters can be removed or modified), placing it in the Write category rather than Destructive. The severity is medium because misuse could corrupt StateTree logic or create invalid parameter configurations, but the effect is limited to a single asset and reversible.

From the tool's definition Tool name 'add_statetree_parameter' and description 'Add a tree-level parameter' indicate creation of a new parameter in a StateTree asset within Unreal Engine 5.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

add_statetree_parameter Rate-limited

add_statetree_parameter 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": {
    "add_statetree_parameter": {
      "limits": [
        {
          "counter": "add_statetree_parameter_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 add_statetree_parameter call is checked against it from then on.

FAQ

Questions about add_statetree_parameter

What does the add_statetree_parameter tool do? +

Add a tree-level parameter. 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 add_statetree_parameter? +

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

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

Can I rate-limit add_statetree_parameter? +

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

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

add_statetree_parameter 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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