frame · Selenium MCP: Risk & Policy

WHAT IT DOES

What frame does on Selenium

AI agents invoke frame 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 frame needs a policy

This tool controls browser navigation context by switching focus between frames and the main page. It triggers an external browser operation (frame switching) that affects subsequent browser automation actions. While not directly destructive or financial, it executes a browser state change that can enable or redirect further automated actions within specific frame contexts, making Execute the appropriate category.

From the tool's definition Switch focus to a frame or back to the main page. Actions: switch, default.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

frame Rate-limited

frame 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": {
    "frame": {
      "limits": [
        {
          "counter": "frame_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 frame

What does the frame tool do? +

Switch focus to a frame or back to the main page. Actions: switch, default. 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 frame? +

Register the Selenium MCP server in PolicyLayer and add a rule for frame: 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 frame? +

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

Can I rate-limit frame? +

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

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

frame 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.