screenshot_active_window

Take a screenshot of the foreground window.

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

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

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

WHAT IT DOES

What screenshot_active_window does on Mcp Control Plane

AI agents call screenshot_active_window to retrieve information from Mcp Control Plane without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why screenshot_active_window is rated Low

This tool retrieves visual information from the active window without altering system state or executing commands. However, it merits medium severity because screenshots can expose sensitive data (passwords, tokens, PII) visible on screen, creating a meaningful risk if an AI agent is compromised or acts against user intent.

From the tool's definition Tool name 'screenshot_active_window' and description 'Take a screenshot of the foreground window' indicate passive image capture of visible UI content with no modification or execution of code.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs screenshot_active_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 screenshot_active_window, this is the rule to start with:

screenshot_active_window Allowed

screenshot_active_window is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "screenshot_active_window": {}
  }
}

ALLOW ONLY 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 screenshot_active_window call is checked against it from then on.

FAQ

Questions about screenshot_active_window

What does the screenshot_active_window tool do? +

Take a screenshot of the foreground window. It is categorised as a Read tool in the Mcp Control Plane MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on screenshot_active_window? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for screenshot_active_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 screenshot_active_window? +

screenshot_active_window is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit screenshot_active_window? +

Yes. Add a rate_limit block to the screenshot_active_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 screenshot_active_window completely? +

Set action: deny in the PolicyLayer policy for screenshot_active_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 screenshot_active_window? +

screenshot_active_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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