nx_generate_package · Promethean OS MCP: Risk & Policy

WHAT IT DOES

What nx_generate_package does on Promethean OS MCP

AI agents invoke nx_generate_package to trigger actions in Promethean OS MCP. 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 nx_generate_package needs a policy

This tool runs the Nx generator, which executes code generation tooling that creates files, modifies workspace configuration, and triggers external CLI operations. It goes beyond a simple write because it invokes a generator/executor (external tool execution) that can produce wide-ranging side effects across the workspace.

From the tool's definition Generate a new workspace package using the Nx tools:package generator

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nx_generate_package Rate-limited

nx_generate_package 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": {
    "nx_generate_package": {
      "limits": [
        {
          "counter": "nx_generate_package_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 Promethean OS MCP, so you can run agents against it safely.

FAQ

Questions about nx_generate_package

What does the nx_generate_package tool do? +

Generate a new workspace package using the Nx tools:package generator. It is categorised as a Execute tool in the Promethean OS MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on nx_generate_package? +

Register the Promethean OS MCP server in PolicyLayer and add a rule for nx_generate_package: 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 Promethean OS MCP. Nothing to install.

What risk level is nx_generate_package? +

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

Can I rate-limit nx_generate_package? +

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

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

nx_generate_package is provided by the Promethean OS MCP server (octave-commons/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.