computer_middle_click · Computer Use MCP Server MCP

WHAT IT DOES

What computer_middle_click does on Computer Use MCP Server

AI agents invoke computer_middle_click to trigger actions in Computer Use MCP Server. 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 computer_middle_click needs a policy

Executing a middle-click is a browser/desktop action whose effects depend entirely on what is under the cursor at the time. It can trigger external operations (opening URLs, closing windows, pasting text) and falls squarely in the Execute category as it performs an action with context-dependent side effects.

From the tool's definition Middle-click at the given coordinates — triggers a mouse action on an X11 desktop that can cause UI interactions (e.g., opening links in new tabs, pasting clipboard content, closing tabs) depending on the target application and context.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

computer_middle_click Rate-limited

computer_middle_click 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": {
    "computer_middle_click": {
      "limits": [
        {
          "counter": "computer_middle_click_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 MCP Server, so you can run agents against it safely.

FAQ

Questions about computer_middle_click

What does the computer_middle_click tool do? +

Middle-click at the given coordinates. It is categorised as a Execute tool in the Computer Use MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on computer_middle_click? +

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

What risk level is computer_middle_click? +

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

Can I rate-limit computer_middle_click? +

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

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

computer_middle_click is provided by the Computer Use MCP Server MCP server (sebastianbaltes/claude_code_computer_use_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.