tab_switch · Tradingview MCP: Risk & Policy

WHAT IT DOES

What tab_switch does on Tradingview

AI agents invoke tab_switch to trigger actions in Tradingview. 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.

WHY IT NEEDS A POLICY

Why tab_switch needs a policy

This tool executes a browser/application UI action (switching tabs) in the locally running TradingView Desktop app via CDP. It is not merely reading data, but actively controlling the application's state. Misuse could disrupt a user's active workflow or cause unintended chart context switches during live trading analysis, warranting medium severity.

From the tool's definition Switch to a chart tab by index — triggers a UI action in the TradingView Desktop app via Chrome DevTools Protocol

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tab_switch Rate-limited

tab_switch 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": {
    "tab_switch": {
      "limits": [
        {
          "counter": "tab_switch_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Tradingview, so you can run agents against it safely.

FAQ

Questions about tab_switch

What does the tab_switch tool do? +

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

How do I enforce a policy on tab_switch? +

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

What risk level is tab_switch? +

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

Can I rate-limit tab_switch? +

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

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

tab_switch is provided by the Tradingview MCP server (lionfaion/tradingview-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.