browserbase_stagehand_agent · Browserbase MCP Server MCP

WHAT IT DOES

What browserbase_stagehand_agent does on Browserbase MCP Server

AI agents invoke browserbase_stagehand_agent to trigger actions in Browserbase 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 browserbase_stagehand_agent needs a policy

This tool runs an autonomous AI agent (Gemini Computer Use) to perform web interactions based on user-supplied task descriptions. The scope of actions is not pre-constrained — the agent decides what web pages to visit, what buttons to click, and what data to submit.

From the tool's definition Tool description explicitly states 'Execute a task autonomously' and 'navigate and interact with web pages to complete the given task' — these are external operations whose effects depend on task arguments.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browserbase_stagehand_agent Rate-limited

browserbase_stagehand_agent 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": {
    "browserbase_stagehand_agent": {
      "limits": [
        {
          "counter": "browserbase_stagehand_agent_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 Browserbase MCP Server, so you can run agents against it safely.

FAQ

Questions about browserbase_stagehand_agent

What does the browserbase_stagehand_agent tool do? +

Execute a task autonomously using Gemini Computer Use agent. The agent will navigate and interact with web pages to complete the given task. It is categorised as a Execute tool in the Browserbase 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 browserbase_stagehand_agent? +

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

What risk level is browserbase_stagehand_agent? +

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

Can I rate-limit browserbase_stagehand_agent? +

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

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

browserbase_stagehand_agent is provided by the Browserbase MCP Server MCP server (mesuterpikin/mcp-server-browserbase). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.