browser_switch_tab

Switch to a browser tab by tab id

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/browser-switch-tab.md

WHAT IT DOES

What browser_switch_tab does on CoWork OS

AI agents invoke browser_switch_tab to trigger actions in CoWork OS. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why browser_switch_tab is rated High

This tool triggers an external browser action (switching tabs), which constitutes executing an operation in a running browser environment. While not destructive or financial, it can redirect the browser context in ways that affect user experience or automate navigation, making it an Execute-level action with medium severity.

From the tool's definition Switch to a browser tab by tab id

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_switch_tab safely

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

browser_switch_tab Rate-limited

browser_switch_tab stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "browser_switch_tab": {
      "limits": [
        {
          "counter": "browser_switch_tab_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about browser_switch_tab

What does the browser_switch_tab tool do? +

Switch to a browser tab by tab id. It is categorised as a Execute tool in the CoWork OS MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on browser_switch_tab? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for browser_switch_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 CoWork OS. Nothing to install.

What risk level is browser_switch_tab? +

browser_switch_tab is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit browser_switch_tab? +

Yes. Add a rate_limit block to the browser_switch_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 browser_switch_tab completely? +

Set action: deny in the PolicyLayer policy for browser_switch_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 browser_switch_tab? +

browser_switch_tab is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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