browser_list_sessions

List active browser sessions

SERVERClaude Mobile SOURCEalexgladkov/claude-in-mobile

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/alexgladkov-claude-in-mobile/browser-list-sessions.md

WHAT IT DOES

What browser_list_sessions does on Claude Mobile

AI agents call browser_list_sessions to retrieve information from Claude Mobile without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why browser_list_sessions is rated Low

This tool retrieves or enumerates existing browser session data, which is a read-only operation with no side effects. It does not create, modify, delete, or execute any operations. The blast radius of misuse is minimal—an agent could only view session information without causing damage or taking unauthorized actions.

From the tool's definition Tool name 'browser_list_sessions' and description 'List active browser sessions' indicate a query operation that retrieves information about existing browser sessions without modifying or executing actions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_list_sessions safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude Mobile, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For browser_list_sessions, this is the rule to start with:

browser_list_sessions Allowed

browser_list_sessions is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "browser_list_sessions": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude Mobile, apply this rule, and every browser_list_sessions call is checked against it from then on.

FAQ

Questions about browser_list_sessions

What does the browser_list_sessions tool do? +

List active browser sessions. It is categorised as a Read tool in the Claude Mobile MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on browser_list_sessions? +

Register the Claude Mobile MCP server in PolicyLayer and add a rule for browser_list_sessions: 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 Claude Mobile. Nothing to install.

What risk level is browser_list_sessions? +

browser_list_sessions is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit browser_list_sessions? +

Yes. Add a rate_limit block to the browser_list_sessions 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.

How do I block browser_list_sessions completely? +

Set action: deny in the PolicyLayer policy for browser_list_sessions. 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.

What MCP server provides browser_list_sessions? +

browser_list_sessions is provided by the Claude Mobile MCP server (alexgladkov/claude-in-mobile). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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