This record as markdown: /tools/anirbandz-chrome-mcp-devtool/new-page.md
What new_page does on Chrome DevTools MCP
AI agents invoke new_page to trigger actions in Chrome DevTools MCP. 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 new_page is rated High
Opening a new browser page is an external side-effecting operation that interacts with a live browser environment. It is not a simple read, nor does it destroy data or involve finances. It falls under Execute because it triggers a browser-level action whose effects depend on the Chrome DevTools Protocol session state.
From the tool's definition Creates a new page — triggers an external browser operation (opening a new tab/page in a live Chrome instance)
Attacks that exploit this kind of access
The rule that runs new_page safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Chrome DevTools MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For new_page, this is the rule to start with:
new_page 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Chrome DevTools MCP, apply this rule, and every new_page call is checked against it from then on.
Questions about new_page
Creates a new page. It is categorised as a Execute tool in the Chrome DevTools MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Chrome DevTools MCP server in PolicyLayer and add a rule for new_page: 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 Chrome DevTools MCP. Nothing to install.
new_page 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 new_page 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 new_page. 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.
new_page is provided by the Chrome DevTools MCP server (anirbandz/chrome_mcp_devtool). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Chrome DevTools, and thousands of servers like it.
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