Lists all open pages in the browser. Pass pageIdx to select a page as context for future tool calls.
AI agents call select_page to retrieve information from JS Reverse MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool primarily reads/lists available browser pages and sets a context parameter for subsequent calls. It does not modify, execute, or delete anything — it just enumerates open pages and selects one as the active context. The selection itself is a stateful but reversible and non-destructive operation with low blast radius.
From the tool's definition Lists all open pages in the browser. Pass pageIdx to select a page as context for future tool calls.
Attacks that exploit this kind of access
Lists all open pages in the browser. Pass pageIdx to select a page as context for future tool calls. It is categorised as a Read tool in the JS Reverse MCP MCP Server, which means it retrieves data without modifying state.
Register the JS Reverse MCP server in PolicyLayer and add a rule for select_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 JS Reverse MCP. Nothing to install.
select_page is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the select_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 select_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.
select_page is provided by the JS Reverse MCP server (zhizhuodemao/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.