left_click_drag · Computer Use Windows MCP: Risk & Policy

WHAT IT DOES

What left_click_drag does on Computer Use Windows

AI agents invoke left_click_drag to trigger actions in Computer Use Windows. 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 left_click_drag needs a policy

A click-drag operation triggers UI interactions (e.g., moving files, selecting regions, dragging UI elements) whose effects depend entirely on the arguments provided. This can cause irreversible side effects depending on context (e.g., moving/deleting files via drag-to-trash), but the primary classification is Execute since it runs an interactive desktop action.

From the tool's definition 'Press, move to target, and release' — describes a mouse drag action that performs interactive desktop control; part of a server enabling 'mouse and keyboard input' and 'desktop control'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

left_click_drag Rate-limited

left_click_drag 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": {
    "left_click_drag": {
      "limits": [
        {
          "counter": "left_click_drag_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 Computer Use Windows, so you can run agents against it safely.

FAQ

Questions about left_click_drag

What does the left_click_drag tool do? +

Press, move to target, and release. ${FRONTMOST_GATE_DESC}. It is categorised as a Execute tool in the Computer Use Windows MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on left_click_drag? +

Register the Computer Use Windows MCP server in PolicyLayer and add a rule for left_click_drag: 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 Computer Use Windows. Nothing to install.

What risk level is left_click_drag? +

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

Can I rate-limit left_click_drag? +

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

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

left_click_drag is provided by the Computer Use Windows MCP server (wimi321/windows-computer-use-skill). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.