playwright_expect_response

WHAT IT DOES

What playwright_expect_response does on Playwright MCP Server for Security

AI agents invoke playwright_expect_response to trigger actions in Playwright MCP Server for Security. 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 playwright_expect_response needs a policy

This tool executes a browser automation operation that initiates network monitoring/response waiting. While it does not directly modify data, it triggers side effects by setting up wait conditions for HTTP traffic, which affects subsequent browser behavior and can be leveraged to interact with web applications in ways that depend on the arguments provided.

From the tool's definition The tool "playwright_expect_response" initiates a wait operation for HTTP responses, which is a control mechanism that triggers external operations (network monitoring/interception).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

playwright_expect_response Rate-limited

playwright_expect_response 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": {
    "playwright_expect_response": {
      "limits": [
        {
          "counter": "playwright_expect_response_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 Playwright MCP Server for Security, so you can run agents against it safely.

FAQ

Questions about playwright_expect_response

What does the playwright_expect_response tool do? +

Ask Playwright to start waiting for a HTTP response. This tool initiates the wait operation but does not wait for its completion. It is categorised as a Execute tool in the Playwright MCP Server for Security MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on playwright_expect_response? +

Register the Playwright MCP Server for Security MCP server in PolicyLayer and add a rule for playwright_expect_response: 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 Playwright MCP Server for Security. Nothing to install.

What risk level is playwright_expect_response? +

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

Can I rate-limit playwright_expect_response? +

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

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

playwright_expect_response is provided by the Playwright MCP Server for Security MCP server (o0x1024/mcp-playwright-security). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.