AI agents invoke browser_tab_select 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.
Selecting a browser tab is a browser automation action that changes the state of the browser session. Within an agentic browser automation context (alongside tools like browser_click, browser_drag, etc.), this is an Execute-category action as it triggers an external browser operation.
From the tool's definition 'Select a tab by index' — triggers a browser action that changes the active tab state in a cloud browser automation environment
Documented attack patterns abuse exactly the kind of access browser_tab_select 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_select:
{
"version": "1",
"default": "deny",
"tools": {
"browser_tab_select": {
"limits": [
{
"counter": "browser_tab_select_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}browser_tab_select 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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Select a tab by index. 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_select: 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_select 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_select 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_select. 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_select 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.