open_tabs

SERVER2manytabs Mcp Host SOURCE2manytabs-mcp-host

Medium RISK CLASS

Category Write

Parameters 11 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/2manytabs-mcp-host/open-tabs.md

WHAT IT DOES

What open_tabs does on 2manytabs Mcp Host

AI agents use open_tabs to create or update resources in 2manytabs Mcp Host, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 2manytabs Mcp Host environment.

Parameter	Type	Required	Description
`urls`	array	Yes	An array of URLs to open. If no protocol is provided, https:// will be prepended automatically.

Parameters from the server's own tool schema.

RISK

Why open_tabs is rated Medium

An AI agent can call open_tabs faster than any human can review: one bad instruction and it creates or modifies resources in 2manytabs Mcp Host by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs open_tabs safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 2manytabs Mcp Host, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For open_tabs, this is the rule to start with:

open_tabs Rate-limited

open_tabs stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "open_tabs": {
      "limits": [
        {
          "counter": "open_tabs_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 2manytabs Mcp Host, apply this rule, and every open_tabs call is checked against it from then on.

FAQ

Questions about open_tabs

What does the open_tabs tool do? +

Open one or more URLs in new Chrome tabs. This tool allows you to navigate the user to specific web pages or search queries. Examples: - {"urls": ["https://github.com", "https://youtube.com"]} - {"urls": ["en.wikipedia.org/wiki/Palantir"]} Returns: JSON object containing: - opened (int): Number of tabs successfully opened. It is categorised as a Write tool in the 2manytabs Mcp Host MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does open_tabs accept? +

open_tabs accepts 1 parameter: urls. Required: urls. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on open_tabs? +

Register the 2manytabs Mcp Host MCP server in PolicyLayer and add a rule for open_tabs: 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 2manytabs Mcp Host. Nothing to install.

What risk level is open_tabs? +

open_tabs is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit open_tabs? +

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

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

open_tabs is provided by the 2manytabs Mcp Host MCP server (2manytabs-mcp-host). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on 2manytabs Mcp Host, and thousands of servers like it.

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The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →