playwright_create_page · MCP Developer Server MCP

WHAT IT DOES

What playwright_create_page does on MCP Developer Server

AI agents invoke playwright_create_page to trigger actions in MCP Developer 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 playwright_create_page needs a policy

Creating a Playwright browser page initiates an external browser process/context. While not inherently destructive, it enables browser automation that can interact with web resources, execute JavaScript, and perform actions depending on subsequent usage. It falls under Execute as it triggers external operations in a browser environment.

From the tool's definition 'Create a new page in a Playwright browser' — spawns a browser page via Playwright, triggering external browser operations

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

playwright_create_page Rate-limited

playwright_create_page 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_create_page": {
      "limits": [
        {
          "counter": "playwright_create_page_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 MCP Developer Server, so you can run agents against it safely.

FAQ

Questions about playwright_create_page

What does the playwright_create_page tool do? +

Create a new page in a Playwright browser. It is categorised as a Execute tool in the MCP Developer 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 playwright_create_page? +

Register the MCP Developer Server MCP server in PolicyLayer and add a rule for playwright_create_page: 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 MCP Developer Server. Nothing to install.

What risk level is playwright_create_page? +

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

Can I rate-limit playwright_create_page? +

Yes. Add a rate_limit block to the playwright_create_page 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_create_page completely? +

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

playwright_create_page is provided by the MCP Developer Server MCP server (ra86-dev/mcpdev-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.