activate_tab

Bring a specific browser tab to the foreground. This activates the tab and focuses its containing window so the user sees it immediately.

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/activate-tab.md

WHAT IT DOES

What activate_tab does on 2manytabs Mcp Host

AI agents use activate_tab 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
`tab_id`	integer	Yes	The numeric ID of the tab to activate.

Parameters from the server's own tool schema.

RISK

Why activate_tab is rated Medium

An AI agent can call activate_tab 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 activate_tab 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 activate_tab, this is the rule to start with:

activate_tab Rate-limited

activate_tab 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": {
    "activate_tab": {
      "limits": [
        {
          "counter": "activate_tab_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 activate_tab call is checked against it from then on.

FAQ

Questions about activate_tab

What does the activate_tab tool do? +

Bring a specific browser tab to the foreground. This activates the tab and focuses its containing window so the user sees it immediately. 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 activate_tab accept? +

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

How do I enforce a policy on activate_tab? +

Register the 2manytabs Mcp Host MCP server in PolicyLayer and add a rule for activate_tab: 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 activate_tab? +

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

Can I rate-limit activate_tab? +

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

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

activate_tab 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

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