generate_app · McFlow MCP: Risk & Policy

WHAT IT DOES

What generate_app does on McFlow

AI agents use generate_app to create or update resources in McFlow — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your McFlow environment.

WHY IT NEEDS A POLICY

Why generate_app needs a policy

This tool generates (creates) a Next.js application within the current project. It writes new files and project structure to disk. It is reversible in the sense that the generated files can be deleted. There is no indication of destructive, financial, or arbitrary code execution behavior — it is a scaffolding/creation action, placing it in the Write category.

From the tool's definition Generate a Next.js app for managing workflow data within the current project

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_app Rate-limited

generate_app stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_app": {
      "limits": [
        {
          "counter": "generate_app_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about generate_app

What does the generate_app tool do? +

Generate a Next.js app for managing workflow data within the current project. It is categorised as a Write tool in the McFlow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_app? +

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

What risk level is generate_app? +

generate_app is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit generate_app? +

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

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

generate_app is provided by the McFlow MCP server (mckinleymedia/mcflow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.