send_mouse_move

THE RISK

High Risk

Why send_mouse_move needs a policy

This tool triggers external browser/UI operations by moving the mouse cursor to specific coordinates within a Scenic application. It produces side effects in the UI environment (triggering hover states, mouse-over interactions) rather than simply reading data. It falls under Execute as it performs UI automation actions whose effects depend on the coordinates provided.

From the tool's definition Move the mouse cursor to specific coordinates... testing mouse-over interactions

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

POLICY

How to control send_mouse_move

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

policy.json

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

send_mouse_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.

Create a free account and register Scenic MCP — 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 Scenic MCP tools

Execute click_element SEMANTIC CLICK: Click an element by its semantic ID. This is the high-level equivalent of Execute connect_scenic CONNECTION SETUP: Establish the connection to the ScenicMCP GenServer running inside our S Execute hover_element SEMANTIC HOVER: Move the mouse to hover over an element by its semantic ID. Finds the elem Execute send_keys KEYBOARD INPUT: Send text input or special keystrokes to the Scenic application. Use for t Execute send_mouse_click MOUSE INTERACTION: Click at specific screen coordinates to interact with buttons, links, a Read find_clickable_elements SEMANTIC DISCOVERY: Find all clickable elements in the viewport with their semantic IDs, t Read get_scenic_status CONNECTION STATUS: Check if we are connected to a Scenic app and fetch details. Read inspect_viewport UI ANALYSIS: Get a detailed text-based description of what\

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Go deeper

High-risk tools in Scenic MCP → 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 send_mouse_move

What does the send_mouse_move tool do? +

CURSOR MOVEMENT: Move the mouse cursor to specific coordinates. Useful for hover effects, precise positioning before clicking, and testing mouse-over interactions. It is categorised as a Execute tool in the Scenic MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on send_mouse_move? +

Register the Scenic MCP server in PolicyLayer and add a rule for send_mouse_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 Scenic MCP. Nothing to install.

What risk level is send_mouse_move? +

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

Can I rate-limit send_mouse_move? +

Yes. Add a rate_limit block to the send_mouse_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 send_mouse_move completely? +

Set action: deny in the PolicyLayer policy for send_mouse_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 send_mouse_move? +

send_mouse_move is provided by the Scenic MCP server (scenic-contrib/scenic_mcp_experimental). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Scenic MCP tool call.

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

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