Navigate to the previous search match and scroll into view.
AI agents invoke browser_search_prev to trigger actions in Termux Browser Pilot. 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 navigation action (moving to the previous search match and scrolling), which is an external operation executed in a real browser environment. It doesn't merely read data — it actively controls the browser state and viewport, making it an Execute-category action. Misuse is limited in blast radius since it only navigates within existing search results, hence medium severity.
From the tool's definition Navigate to the previous search match and scroll into view
Documented attack patterns abuse exactly the kind of access browser_search_prev gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Termux Browser Pilot, and nothing reaches the server without passing your rules. This is the rule we recommend for browser_search_prev:
{
"version": "1",
"default": "deny",
"tools": {
"browser_search_prev": {
"limits": [
{
"counter": "browser_search_prev_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}browser_search_prev 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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Navigate to the previous search match and scroll into view. It is categorised as a Execute tool in the Termux Browser Pilot MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Termux Browser Pilot MCP server in PolicyLayer and add a rule for browser_search_prev: 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 Termux Browser Pilot. Nothing to install.
browser_search_prev 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_search_prev 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_search_prev. 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_search_prev is provided by the Termux Browser Pilot MCP server (salviz/termux-browser-pilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Termux Browser Pilot, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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148 Termux Browser Pilot tools catalogued and risk-classified — across an index of 43,000+ MCP servers.