click_at_current_position

THE RISK

High Risk

Why click_at_current_position needs a policy

This tool performs a mouse click action on a remote desktop via VNC. Clicking can trigger arbitrary UI interactions — opening files, submitting forms, activating buttons — making it an Execute-level action. Severity is high because an AI agent could misuse clicks to trigger destructive or unintended desktop operations.

From the tool's definition Tool name 'click_at_current_position' on a VNC server described as providing 'mouse and keyboard control, and automation'

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

POLICY

How to control click_at_current_position

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

policy.json

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

click_at_current_position 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 Vnc — 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 Vnc tools

Execute click_at_current_position_with_keys_held click_at_current_position_with_keys_held Execute move_mouse_to Moves the mouse to the coordinates (x, y) in the VNC session's workspace. Execute move_mouse_with_keys_and_mouse_button_held move_mouse_with_keys_and_mouse_button_held Execute move_mouse_with_keys_held Moves the mouse from (start_x, start_y) to (end_x, end_y) while holding a number of keys. Execute move_mouse_with_mouse_button_held move_mouse_with_mouse_button_held Execute strike_keys strike_keys Execute strike_keys_with_keys_held strike_keys_with_keys_held Execute strike_keys_with_mouse_button_and_keys_held strike_keys_with_mouse_button_and_keys_held

All 20 Vnc tools →

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Go deeper

High-risk tools in Vnc → 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 click_at_current_position

What does the click_at_current_position tool do? +

click_at_current_position. It is categorised as a Execute tool in the Vnc MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on click_at_current_position? +

Register the Vnc MCP server in PolicyLayer and add a rule for click_at_current_position: 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 Vnc. Nothing to install.

What risk level is click_at_current_position? +

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

Can I rate-limit click_at_current_position? +

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

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

click_at_current_position is provided by the Vnc MCP server (regulad/vnc-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Vnc tool call.

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

CHECK YOUR STACK →