os_unity_setup · OScribe MCP: Risk & Policy

WHAT IT DOES

What os_unity_setup does on OScribe

AI agents invoke os_unity_setup to trigger actions in OScribe. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why os_unity_setup needs a policy

This tool performs multiple high-impact operations: downloading external software (BepInEx mod loader), installing it into a game folder, and compiling/injecting a DLL. These are external execution and write operations with significant blast radius — modifying game installations, introducing third-party code, and potentially altering system state.

From the tool's definition Automates the full pipeline: Downloads and installs BepInEx 5 mod loader, Compiles OScribeBridge.dll adapted to the game — triggers external downloads, installations, and code compilation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

os_unity_setup Rate-limited

os_unity_setup 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches OScribe, so you can run agents against it safely.

FAQ

Questions about os_unity_setup

What does the os_unity_setup tool do? +

Automatically set up the Unity Bridge for any Unity Mono game (Windows & macOS). This tool automates the full pipeline: 1. Detect: Analyzes the game folder (runtime, DLLs, architecture) 2. BepInEx: Downloads and installs BepInEx 5 mod loader 3. Build: Compiles OScribeBridge.dll adapted to the game. It is categorised as a Execute tool in the OScribe MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on os_unity_setup? +

Register the OScribe MCP server in PolicyLayer and add a rule for os_unity_setup: 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 OScribe. Nothing to install.

What risk level is os_unity_setup? +

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

Can I rate-limit os_unity_setup? +

Yes. Add a rate_limit block to the os_unity_setup 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 os_unity_setup completely? +

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

os_unity_setup is provided by the OScribe MCP server (mikealkeal/oscribe). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.