tab_move · It2 MCP: Risk & Policy

WHAT IT DOES

What tab_move does on It2mcp

AI agents invoke tab_move to trigger actions in It2mcp. 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 tab_move needs a policy

Moving a tab to a new window triggers an external operation within the iTerm2 application that rearranges the UI state. It is not a simple data read or write, but an action that causes a structural change in the terminal session layout. It is reversible (tabs can be moved back), so it does not qualify as Destructive. Execute best captures this UI/session manipulation action.

From the tool's definition Move a tab to its own new window

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tab_move Rate-limited

tab_move 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": {
    "tab_move": {
      "limits": [
        {
          "counter": "tab_move_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 It2mcp, so you can run agents against it safely.

FAQ

Questions about tab_move

What does the tab_move tool do? +

Move a tab to its own new window. It is categorised as a Execute tool in the It2mcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on tab_move? +

Register the It2 MCP server in PolicyLayer and add a rule for tab_move: 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 It2mcp. Nothing to install.

What risk level is tab_move? +

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

Can I rate-limit tab_move? +

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

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

tab_move is provided by the It2 MCP server (urjitbhatia/it2mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.