close-browser · TgeBrowser MCP Server MCP: Risk & Policy

WHAT IT DOES

What close-browser does on TgeBrowser MCP Server

AI agents invoke close-browser to trigger actions in TgeBrowser MCP 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 close-browser needs a policy

Closing a browser is an execution action that terminates a running process. While it doesn't delete data permanently (the profile remains), it does interrupt any active browser session and any ongoing automation tasks, which can have significant side effects. It's not purely destructive since the browser profile can be reopened, but it triggers an external operation (process termination).

From the tool's definition 'Close the browser' - terminates a running browser session/process

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

close-browser Rate-limited

close-browser 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": {
    "close-browser": {
      "limits": [
        {
          "counter": "close-browser_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 TgeBrowser MCP Server, so you can run agents against it safely.

FAQ

Questions about close-browser

What does the close-browser tool do? +

Close the browser. It is categorised as a Execute tool in the TgeBrowser MCP 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 close-browser? +

Register the TgeBrowser MCP Server MCP server in PolicyLayer and add a rule for close-browser: 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 TgeBrowser MCP Server. Nothing to install.

What risk level is close-browser? +

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

Can I rate-limit close-browser? +

Yes. Add a rate_limit block to the close-browser 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 close-browser completely? +

Set action: deny in the PolicyLayer policy for close-browser. 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 close-browser? +

close-browser is provided by the TgeBrowser MCP Server MCP server (tuguang2025/tgebrowser-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.