BrowserListTabs

List all tabs in the current in-app browser session, including the user-visible tab and Agent working tab. Use tabId when intentionally operating another tab.

SERVERDutyDeck SOURCEtaokoplay/DutyDeck

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/dutydeck/browserlisttabs.md

WHAT IT DOES

What BrowserListTabs does on DutyDeck

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

RISK

Why BrowserListTabs is rated Low

Even though BrowserListTabs only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs BrowserListTabs safely

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

BrowserListTabs Allowed

BrowserListTabs 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": {
    "BrowserListTabs": {}
  }
}

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

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

FAQ

Questions about BrowserListTabs

What does the BrowserListTabs tool do? +

List all tabs in the current in-app browser session, including the user-visible tab and Agent working tab. Use tabId when intentionally operating another tab. It is categorised as a Read tool in the DutyDeck MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on BrowserListTabs? +

Register the DutyDeck MCP server in PolicyLayer and add a rule for BrowserListTabs: 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 DutyDeck. Nothing to install.

What risk level is BrowserListTabs? +

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

Can I rate-limit BrowserListTabs? +

Yes. Add a rate_limit block to the BrowserListTabs 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 BrowserListTabs completely? +

Set action: deny in the PolicyLayer policy for BrowserListTabs. 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 BrowserListTabs? +

BrowserListTabs is provided by the DutyDeck MCP server (taokoplay/DutyDeck). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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