List all active browser instances with their status
AI agents call list_browsers to retrieve information from Pydoll without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that queries and returns the state of active browser instances. It has no side effects, does not execute commands, and does not modify any data. The blast radius of misuse is minimal—an attacker could only gain visibility into what browsers are running, which does not compromise system integrity or enable further malicious actions without chaining to other tools.
From the tool's definition Tool name 'list_browsers' and description 'List all active browser instances with their status' indicate a query operation that retrieves information about running browsers without modifying or executing any actions.
Documented attack patterns abuse exactly the kind of access list_browsers gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pydoll, and nothing reaches the server without passing your rules. This is the rule we recommend for list_browsers:
{
"version": "1",
"default": "deny",
"tools": {
"list_browsers": {}
}
}list_browsers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all active browser instances with their status. It is categorised as a Read tool in the Pydoll MCP Server, which means it retrieves data without modifying state.
Register the Pydoll MCP server in PolicyLayer and add a rule for list_browsers: 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 Pydoll. Nothing to install.
list_browsers 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 list_browsers 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 list_browsers. 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.
list_browsers is provided by the Pydoll MCP server (jinsongroh/pydoll-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Pydoll, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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57 Pydoll tools catalogued and risk-classified — across an index of 43,000+ MCP servers.