unity_scene_new

Create a new empty scene (REPLACES the current one). Refuses if any loaded scene has

SERVERUnity MCP Server SOURCEanklebreaker-studio/unity-mcp-server

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/anklebreaker-studio-unity-mcp-server/unity-scene-new.md

WHAT IT DOES

What unity_scene_new does on Unity MCP Server

AI agents call unity_scene_new to permanently remove resources in Unity MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why unity_scene_new is rated Critical

Replacing the current scene is an irreversible destructive action — any unsaved changes or the current scene state are lost when the new empty scene overwrites it. The description also hints at conditions under which it refuses (likely unsaved changes), confirming the destructive nature of the operation.

From the tool's definition Create a new empty scene (REPLACES the current one)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unity_scene_new safely

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

unity_scene_new Hidden

unity_scene_new is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "unity_scene_new"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about unity_scene_new

What does the unity_scene_new tool do? +

Create a new empty scene (REPLACES the current one). Refuses if any loaded scene has. It is categorised as a Destructive tool in the Unity MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on unity_scene_new? +

Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_scene_new: 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 Unity MCP Server. Nothing to install.

What risk level is unity_scene_new? +

unity_scene_new is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit unity_scene_new? +

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

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

unity_scene_new is provided by the Unity MCP Server MCP server (anklebreaker-studio/unity-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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