High Risk →

launch_browser

Launch a browser instance (Puppeteer or Playwright). Toggles headless mode.

How to control launch_browser ↓

What launch_browser does on OODA Computer Control

AI agents invoke launch_browser to trigger actions in OODA Computer Control. 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.

High Risk

Why launch_browser needs a policy

Launching a browser instance is an Execute action because it starts an external process whose effects depend on subsequent arguments and configurations (URLs visited, scripts run, interactions performed). While not inherently destructive, it enables the automation of web-based operations with potentially significant side effects.

From the tool's definition Tool launches a browser instance with Puppeteer or Playwright, which are browser automation frameworks capable of executing code and triggering external operations.

Documented attack patterns abuse exactly the kind of access launch_browser gives an agent:

How to control launch_browser

PolicyLayer is an MCP gateway — it sits between your AI agents and OODA Computer Control, and nothing reaches the server without passing your rules. This is the rule we recommend for launch_browser:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "launch_browser": {
      "limits": [
        {
          "counter": "launch_browser_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

launch_browser 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.

  1. Create a free account and register OODA Computer Control — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
RATE-LIMIT THIS TOOL →

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Related tools and policies

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Questions about launch_browser

What does the launch_browser tool do? +

Launch a browser instance (Puppeteer or Playwright). Toggles headless mode. It is categorised as a Execute tool in the OODA Computer Control MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on launch_browser? +

Register the OODA Computer Control MCP server in PolicyLayer and add a rule for launch_browser: 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 OODA Computer Control. Nothing to install.

What risk level is launch_browser? +

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

Can I rate-limit launch_browser? +

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

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

launch_browser is provided by the OODA Computer Control MCP server (mnehmos/mnehmos.ooda.mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OODA Computer Control tool call.

Start from OODA Computer Control, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

Free to start. No card required.

99 OODA Computer Control tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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