Critical Risk →

unity_terrain_remove_layer

Remove a texture layer from the terrain by index.

How to control unity_terrain_remove_layer ↓

AI agents call unity_terrain_remove_layer 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.

Critical Risk

This tool irreversibly removes a texture layer from terrain data. Deletion of a terrain layer by index is a destructive operation that cannot be trivially undone, potentially affecting the visual and structural integrity of a Unity scene. Misuse could corrupt terrain appearance across an entire project scene.

From the tool's definition Remove a texture layer from the terrain by index

Documented attack patterns abuse exactly the kind of access unity_terrain_remove_layer gives an agent:

PolicyLayer is an MCP gateway — it sits between your AI agents and Unity MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for unity_terrain_remove_layer:

policy.json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "unity_terrain_remove_layer"
  ]
}

unity_terrain_remove_layer disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

  1. Create a free account and register Unity MCP Server — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Go deeper

What does the unity_terrain_remove_layer tool do? +

Remove a texture layer from the terrain by index. 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_terrain_remove_layer? +

Register the Unity MCP Server MCP server in PolicyLayer and add a rule for unity_terrain_remove_layer: 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_terrain_remove_layer? +

unity_terrain_remove_layer 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_terrain_remove_layer? +

Yes. Add a rate_limit block to the unity_terrain_remove_layer 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_terrain_remove_layer completely? +

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

unity_terrain_remove_layer 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.

Enforce policy on every Unity MCP Server tool call.

Deterministic rules across all 324 Unity MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

Free to start. No card required.

324 Unity MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

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