tab_new · TradingView MCP Jackson MCP: Risk & Policy

WHAT IT DOES

What tab_new does on TradingView MCP Jackson

AI agents invoke tab_new to trigger actions in TradingView MCP Jackson. 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_new needs a policy

This tool triggers an external operation (tab creation) whose effects depend on the TradingView application state. While not destructive or financial, it modifies the application environment in a way that cannot be trivially undone and represents an Execute-class action.

From the tool's definition Tool performs 'Open a new chart tab' — an action that executes a state-changing operation (spawning a new UI element) via Chrome DevTools Protocol integration with TradingView Desktop.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tab_new Rate-limited

tab_new 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_new": {
      "limits": [
        {
          "counter": "tab_new_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 Jackson, so you can run agents against it safely.

FAQ

Questions about tab_new

What does the tab_new tool do? +

Open a new chart tab. It is categorised as a Execute tool in the TradingView MCP Jackson 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_new? +

Register the TradingView MCP Jackson MCP server in PolicyLayer and add a rule for tab_new: 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 Jackson. Nothing to install.

What risk level is tab_new? +

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

Can I rate-limit tab_new? +

Yes. Add a rate_limit block to the tab_new 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_new completely? +

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

tab_new is provided by the TradingView MCP Jackson MCP server (nimit791/tradingview-mcp-jackson). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.