vitour_open_page · MCP: Risk & Policy

WHAT IT DOES

What vitour_open_page does on Mcp

AI agents invoke vitour_open_page to trigger actions in Mcp. 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 vitour_open_page needs a policy

This tool starts a server process and opens a browser session via Playwright, which involves executing external processes and initiating a persistent session. It triggers external operations (server startup, browser launch) whose effects depend on the arguments provided, making it an Execute category action. Severity is medium as it opens a browser session that can be further exploited by follow-up browser_* tools.

From the tool's definition 'Start Vitour static server, open a Playwright session on a Vitour page, and keep the session open for follow-up browser_* tools'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vitour_open_page Rate-limited

vitour_open_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": {
    "vitour_open_page": {
      "limits": [
        {
          "counter": "vitour_open_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, so you can run agents against it safely.

FAQ

Questions about vitour_open_page

What does the vitour_open_page tool do? +

Start Vitour static server, open a Playwright session on a Vitour page, and keep the session open for follow-up browser_* tools. It is categorised as a Execute tool in the Mcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vitour_open_page? +

Register the MCP server in PolicyLayer and add a rule for vitour_open_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. Nothing to install.

What risk level is vitour_open_page? +

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

Can I rate-limit vitour_open_page? +

Yes. Add a rate_limit block to the vitour_open_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 vitour_open_page completely? +

Set action: deny in the PolicyLayer policy for vitour_open_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 vitour_open_page? +

vitour_open_page is provided by the MCP server (victormyschik/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.