unity_build

Start a build of the Unity project for a target platform.

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

High RISK CLASS

Category Execute

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-build.md

WHAT IT DOES

What unity_build does on Unity MCP Server

AI agents invoke unity_build to trigger actions in Unity MCP Server. 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.

RISK

Why unity_build is rated High

Building a Unity project is an execute operation that triggers compilation, asset processing, and artifact generation. While not immediately destructive, it consumes compute resources, may overwrite previous build artifacts, and creates deployment-ready binaries.

From the tool's definition Tool description states 'Start a build of the Unity project for a target platform' — this initiates a build process, which is an external operation with side effects that depend on project state and platform arguments.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unity_build 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_build, this is the rule to start with:

unity_build Rate-limited

unity_build 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": {
    "unity_build": {
      "limits": [
        {
          "counter": "unity_build_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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_build call is checked against it from then on.

FAQ

Questions about unity_build

What does the unity_build tool do? +

Start a build of the Unity project for a target platform. 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_build? +

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

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

Can I rate-limit unity_build? +

Yes. Add a rate_limit block to the unity_build 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_build completely? +

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

unity_build 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.

KEEP EXPLORING

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