alert · Selenium MCP: Risk & Policy

WHAT IT DOES

What alert does on Selenium

AI agents invoke alert to trigger actions in Selenium. 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 alert needs a policy

This tool interacts with browser dialog boxes by accepting, dismissing, or sending text to them. These are browser automation actions that trigger external operations (accepting/dismissing dialogs can confirm or cancel operations on a webpage), making it Execute category. Misuse could cause unintended confirmations of destructive web actions, warranting medium severity.

From the tool's definition Handle browser alert/confirm/prompt dialogs. Actions: accept, dismiss, get_text, send_text.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

alert Rate-limited

alert 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": {
    "alert": {
      "limits": [
        {
          "counter": "alert_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 Selenium, so you can run agents against it safely.

FAQ

Questions about alert

What does the alert tool do? +

Handle browser alert/confirm/prompt dialogs. Actions: accept, dismiss, get_text, send_text. It is categorised as a Execute tool in the Selenium MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on alert? +

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

What risk level is alert? +

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

Can I rate-limit alert? +

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

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

alert is provided by the Selenium MCP server (scv-consultants/selenium-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.