unity_terrain_flatten

Flatten the entire terrain to a uniform height.

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-flatten.md

WHAT IT DOES

What unity_terrain_flatten does on Unity MCP Server

AI agents use unity_terrain_flatten 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_flatten is rated Medium

This tool modifies terrain data (height map) in a reversible manner through Unity's undo system, making it Write rather than Destructive. However, the blast radius is high because flattening entire terrain could significantly impact game level design and require substantial effort to restore manually, even if technically reversible.

From the tool's definition Tool name 'unity_terrain_flatten' and description 'Flatten the entire terrain to a uniform height' indicate the tool modifies terrain geometry data across the entire landscape.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

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

unity_terrain_flatten Rate-limited

unity_terrain_flatten 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_flatten": {
      "limits": [
        {
          "counter": "unity_terrain_flatten_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_flatten call is checked against it from then on.

FAQ

Questions about unity_terrain_flatten

What does the unity_terrain_flatten tool do? +

Flatten the entire terrain to a uniform height. 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_flatten? +

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

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

Can I rate-limit unity_terrain_flatten? +

Yes. Add a rate_limit block to the unity_terrain_flatten 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_flatten completely? +

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

unity_terrain_flatten 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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