AI agents invoke browser_hover 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.
Hovering is a browser action that executes an interaction in an external environment. While hovering itself has minimal direct side effects, it can trigger UI changes (tooltips, dropdowns, dynamic content loading) in the cloud execution environment. It falls under Execute as it performs an action in a remote browser rather than just reading data.
From the tool's definition 'Hover over element on page' — triggers a browser interaction (mouse hover) on a remote cloud-based browser environment
Documented attack patterns abuse exactly the kind of access browser_hover 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_hover:
{
"version": "1",
"default": "deny",
"tools": {
"browser_hover": {
"limits": [
{
"counter": "browser_hover_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}browser_hover 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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Hover over element on page. 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_hover: 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_hover 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_hover 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_hover. 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_hover 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.
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59 Wuying AgentBay tools catalogued and risk-classified — across an index of 43,000+ MCP servers.