browserbeam_create_session

Server Browserbeam MCP Server nyku/browserbeam-mcp

Category Execute

Risk class High

Parameters 00 required

WHAT IT DOES

What browserbeam_create_session does on Browserbeam MCP Server

AI agents invoke browserbeam_create_session to trigger actions in Browserbeam 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 browserbeam_create_session needs a policy

Creating a browser session initiates an external process (a real browser instance) and optionally navigates to a URL, triggering external operations. This is an Execute-level action as it spins up browser infrastructure and performs web interactions, though it is reversible via browserbeam_close.

From the tool's definition Create a new browser session. Optionally navigate to a URL.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browserbeam_create_session Rate-limited

browserbeam_create_session 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": {
    "browserbeam_create_session": {
      "limits": [
        {
          "counter": "browserbeam_create_session_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 Browserbeam MCP Server, so you can run agents against it safely.

FAQ

Questions about browserbeam_create_session

What does the browserbeam_create_session tool do? +

Create a new browser session. Optionally navigate to a URL. The response already includes page markdown and interactive element refs -- use this as your first observation instead of calling observe separately. Page markdown defaults to a 12,000-character cap; if truncated, call browserbeam_observe with a higher max_text_length or browserbeam_scroll_collect for long pages. When finished with the session, you MUST call browserbeam_close. It is categorised as a Execute tool in the Browserbeam 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 browserbeam_create_session? +

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

What risk level is browserbeam_create_session? +

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

Can I rate-limit browserbeam_create_session? +

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

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

browserbeam_create_session is provided by the Browserbeam MCP Server MCP server (nyku/browserbeam-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.