AI agents invoke browser_tab_new to trigger actions in Wuying AgentBay. 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.
This tool triggers a browser action (opening a new tab) in a cloud execution environment. While not inherently destructive or modifying persistent data, it executes an external operation whose effects depend on how an AI agent chains it with subsequent actions (e.g., navigate to malicious site, perform phishing).
From the tool's definition Tool opens a new browser tab, which is an external operation that performs an action with effects depending on context. The description 'Open a new tab' indicates execution of browser automation commands.
Documented attack patterns abuse exactly the kind of access browser_tab_new gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Wuying AgentBay, and nothing reaches the server without passing your rules. This is the rule we recommend for browser_tab_new:
{
"version": "1",
"default": "deny",
"tools": {
"browser_tab_new": {
"limits": [
{
"counter": "browser_tab_new_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}browser_tab_new 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.
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Open a new tab. It is categorised as a Execute tool in the Wuying AgentBay MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Wuying AgentBay MCP server in PolicyLayer and add a rule for browser_tab_new: 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 Wuying AgentBay. Nothing to install.
browser_tab_new is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the browser_tab_new 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.
Set action: deny in the PolicyLayer policy for browser_tab_new. 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.
browser_tab_new is provided by the Wuying AgentBay MCP server (michael98671/agentbay). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Wuying AgentBay, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
59 Wuying AgentBay tools catalogued and risk-classified — across an index of 43,000+ MCP servers.