Get the list of opened browsers
AI agents call get-opened-browser to retrieve information from TgeBrowser MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about currently opened browsers. It is a pure read operation that retrieves state information without creating, modifying, deleting, or executing any actions. The blast radius is minimal—an AI agent misusing this would only gain visibility into which browsers are running, which poses no security risk by itself.
From the tool's definition Tool name 'get-opened-browser' and description 'Get the list of opened browsers' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get the list of opened browsers. It is categorised as a Read tool in the TgeBrowser MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TgeBrowser MCP Server MCP server in PolicyLayer and add a rule for get-opened-browser: 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 TgeBrowser MCP Server. Nothing to install.
get-opened-browser 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 get-opened-browser 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 get-opened-browser. 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.
get-opened-browser is provided by the TgeBrowser MCP Server MCP server (tuguang2025/tgebrowser-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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