build · GameCodex MCP: Risk & Policy

WHAT IT DOES

What build does on GameCodex

AI agents invoke build to trigger actions in GameCodex. 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 build needs a policy

This tool executes code generation, scaffolding, and build operations whose effects depend on user-provided arguments (game type, project structure, code templates, debug parameters). While it can create files (Write), the primary function is triggering build pipelines and code execution, making it Execute. It is not Destructive because the description does not indicate deletion or irreversible data loss.

From the tool's definition The tool description explicitly lists 'scaffold, code, assets, debug, review' as actions, with 'code' indicating it can write and execute game code. The context 'writing game code' and 'fixing errors' confirms code execution capabilities.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

build Rate-limited

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": {
    "build": {
      "limits": [
        {
          "counter": "build_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 GameCodex, so you can run agents against it safely.

FAQ

Questions about build

What does the build tool do? +

Use when: starting a new project, writing game code, setting up art/audio pipelines, fixing errors, reviewing architecture. Build your game. Actions: scaffold, code, assets, debug, review. It is categorised as a Execute tool in the GameCodex MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on build? +

Register the GameCodex MCP server in PolicyLayer and add a rule for 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 GameCodex. Nothing to install.

What risk level is build? +

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

Can I rate-limit build? +

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

Set action: deny in the PolicyLayer policy for 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 build? +

build is provided by the GameCodex MCP server (wesleysalzer/gamecodex). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.