unity_terrain_set_holes

Create or fill holes in the terrain at a region. Holes make the terrain transparent and non-collidable.

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

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/anklebreaker-studio-unity-mcp-server/unity-terrain-set-holes.md

WHAT IT DOES

What unity_terrain_set_holes does on Unity MCP Server

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

RISK

Why unity_terrain_set_holes is rated Medium

This tool modifies terrain geometry by creating or filling holes, which changes the terrain's visual and physical properties. While it can be reversed (holes can be filled), it meaningfully alters the scene's terrain data. The severity is high because misuse could break level geometry, make areas non-collidable, or disrupt gameplay-critical terrain across a Unity project.

From the tool's definition Create or fill holes in the terrain at a region. Holes make the terrain transparent and non-collidable.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

unity_terrain_set_holes Rate-limited

unity_terrain_set_holes 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": {
    "unity_terrain_set_holes": {
      "limits": [
        {
          "counter": "unity_terrain_set_holes_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 Unity MCP Server, apply this rule, and every unity_terrain_set_holes call is checked against it from then on.

FAQ

Questions about unity_terrain_set_holes

What does the unity_terrain_set_holes tool do? +

Create or fill holes in the terrain at a region. Holes make the terrain transparent and non-collidable. It is categorised as a Write tool in the Unity MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unity_terrain_set_holes? +

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

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

Can I rate-limit unity_terrain_set_holes? +

Yes. Add a rate_limit block to the unity_terrain_set_holes 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_set_holes completely? +

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

unity_terrain_set_holes 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.

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