unity_hub_install_modules

THE RISK

High Risk

Installing software modules triggers external operations that modify the Unity installation environment. This is not a simple write (it runs installation processes), and while it could be partially reversed by uninstalling, the act of installing software and modifying a development environment is best classified as Execute with high severity due to the blast radius of installing unwanted or malicious modules into…

From the tool's definition Install additional platform modules to an already-installed Unity Editor version

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

HOW TO CONTROL UNITY_HUB_INSTALL_MODULES

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_hub_install_modules:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "unity_hub_install_modules": {
      "limits": [
        {
          "counter": "unity_hub_install_modules_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

unity_hub_install_modules stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 324 Unity MCP Server tools →

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Go deeper

High-risk tools in Unity MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the unity_hub_install_modules tool do? +

Install additional platform modules to an already-installed Unity Editor version. It is categorised as a Execute tool in the Unity MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on unity_hub_install_modules? +

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

unity_hub_install_modules is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit unity_hub_install_modules? +

Yes. Add a rate_limit block to the unity_hub_install_modules 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_hub_install_modules completely? +

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

unity_hub_install_modules 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.

GOVERN UNITY →

Free to start. No card required.

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

// WHAT UNITY_HUB_INSTALL_MODULES ON UNITY MCP SERVER DOES

// THE RISK

// HOW TO CONTROL UNITY_HUB_INSTALL_MODULES

// EXPLORE