intercept_requests · Selenium MCP: Risk & Policy

WHAT IT DOES

What intercept_requests does on Selenium

AI agents invoke intercept_requests 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 intercept_requests needs a policy

This tool hooks into network-level browser traffic to intercept, log, or block requests matching a pattern. It triggers external browser-level operations that can suppress or monitor network calls, affecting the behavior of web applications running in the browser session. The ability to 'block' requests constitutes an active interference with network operations, going beyond mere reading, and falls under Execute.

From the tool's definition Register a URL pattern for network interception (log or block)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

intercept_requests Rate-limited

intercept_requests 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": {
    "intercept_requests": {
      "limits": [
        {
          "counter": "intercept_requests_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 intercept_requests

What does the intercept_requests tool do? +

Register a URL pattern for network interception (log or block). 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 intercept_requests? +

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

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

Can I rate-limit intercept_requests? +

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

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

intercept_requests 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.