unity_probuilder_combine

Merge two or more ProBuilder objects into a single ProBuilder mesh (the first object).

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-probuilder-combine.md

WHAT IT DOES

What unity_probuilder_combine does on Unity MCP Server

AI agents use unity_probuilder_combine 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_probuilder_combine is rated Medium

This tool modifies scene data by combining mesh objects, which changes the project state reversibly (the operation could theoretically be undone via undo functionality in Unity). It does not delete data irreversibly, execute arbitrary code, or perform financial transactions.

From the tool's definition Tool description states it merges/combines ProBuilder objects into a single mesh, modifying the first object by absorbing others into it. This is a data modification operation that alters scene geometry state.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

unity_probuilder_combine Rate-limited

unity_probuilder_combine 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_probuilder_combine": {
      "limits": [
        {
          "counter": "unity_probuilder_combine_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_probuilder_combine call is checked against it from then on.

FAQ

Questions about unity_probuilder_combine

What does the unity_probuilder_combine tool do? +

Merge two or more ProBuilder objects into a single ProBuilder mesh (the first object). 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_probuilder_combine? +

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

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

Can I rate-limit unity_probuilder_combine? +

Yes. Add a rate_limit block to the unity_probuilder_combine 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_probuilder_combine completely? +

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

unity_probuilder_combine 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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