// MCP TOOL REFERENCE

vm_create

Create a new sandbox (isolated Ubuntu mini-computer with shell, Chrome + CDP, VNC, xfce4). IMPORTANT: Before creating, check if the user has saved snapshots by looking at the

ServerTaw Computer
CategoryExecute

How to control vm_create ↓

WHAT IT DOES

What vm_create does on Taw Computer

AI agents invoke vm_create to trigger actions in Taw Computer. 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.

THE RISK

High Risk

Why vm_create needs a policy

This tool provisions a new Docker-based Ubuntu desktop environment with shell access, a browser with Chrome DevTools Protocol, VNC, and a GUI desktop. Spawning an isolated compute environment with shell access is an Execute-class action — it creates infrastructure capable of running arbitrary code and commands.

From the tool's definition Create a new sandbox (isolated Ubuntu mini-computer with shell, Chrome + CDP, VNC, xfce4)

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

POLICY

How to control vm_create

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vm_create": {
      "limits": [
        {
          "counter": "vm_create_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

vm_create 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.

Create a free account and register Taw Computer — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Taw Computer tools

Destructive vm_destroy Destroy a sandbox and free its ports. By default the VM filesystem is saved as a snapshot Destructive vm_reset Reset a VM to a clean state. Destroys the current VM AND deletes its saved snapshot, so th Destructive snapshot_delete Delete a saved snapshot by label. This frees disk space and means the next vm_create with Destructive browser_close Kill all Chrome processes inside the sandbox. Execute browser_eval Run a JavaScript expression in the page context and return the result. Execute browser_navigate Navigate the sandbox Chrome to a URL via CDP (Playwright). Returns final URL and page titl Execute browser_run_test Run a Playwright test script against the browser inside a VM. Has Execute browser_wait_for Wait until a condition holds (selector visible, text appears, or network idle).

All 36 Taw Computer tools →

Execute tools on other servers

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Go deeper

High-risk tools in Taw Computer → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about vm_create

What does the vm_create tool do? +

Create a new sandbox (isolated Ubuntu mini-computer with shell, Chrome + CDP, VNC, xfce4). IMPORTANT: Before creating, check if the user has saved snapshots by looking at the. It is categorised as a Execute tool in the Taw Computer MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vm_create? +

Register the Taw Computer MCP server in PolicyLayer and add a rule for vm_create: 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 Taw Computer. Nothing to install.

What risk level is vm_create? +

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

Can I rate-limit vm_create? +

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

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

vm_create is provided by the Taw Computer MCP server (tawgroup/taw-computer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Taw Computer tool call.

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

CHECK YOUR STACK →

Free to start. No card required.

36 Taw Computer tools catalogued and risk-classified — across an index of 43,000+ MCP servers.