activate_window

Activate the first top-level window whose title contains the given text.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-control-plane/activate-window.md

WHAT IT DOES

What activate_window does on Mcp Control Plane

AI agents invoke activate_window to trigger actions in Mcp Control Plane. 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.

RISK

Why activate_window is rated High

This tool triggers an external operation on the desktop environment by bringing a specific window into focus. It interacts with the OS window manager, which can have side effects (e.g., shifting user focus, enabling subsequent automated interactions with that window). It is not a pure read, and its effects depend on the argument provided (the window title text).

From the tool's definition Activate the first top-level window whose title contains the given text

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs activate_window safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Control Plane, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For activate_window, this is the rule to start with:

activate_window Rate-limited

activate_window 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": {
    "activate_window": {
      "limits": [
        {
          "counter": "activate_window_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every activate_window call is checked against it from then on.

FAQ

Questions about activate_window

What does the activate_window tool do? +

Activate the first top-level window whose title contains the given text. It is categorised as a Execute tool in the Mcp Control Plane MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on activate_window? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for activate_window: 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 Mcp Control Plane. Nothing to install.

What risk level is activate_window? +

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

Can I rate-limit activate_window? +

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

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

activate_window is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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