tab_switch · TradingView MCP Bridge MCP: Risk & Policy

WHAT IT DOES

What tab_switch does on TradingView MCP Bridge

AI agents invoke tab_switch to trigger actions in TradingView MCP Bridge. 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

Switching tabs is a browser/application UI action that triggers an external operation (navigating the TradingView interface). It doesn't read data, write/create data, or destroy anything, but it does execute an interaction with an external application. Severity is low as the blast radius of switching a chart tab is minimal.

From the tool's definition 'Switch to a chart tab by index' — triggers a UI navigation action in TradingView Desktop 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 MCP Bridge, 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 Bridge 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 Bridge 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 MCP Bridge. 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 Bridge MCP server (thinhbv/tradingview_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.