chart_set_symbol · Tradingview MCP: Risk & Policy

WHAT IT DOES

What chart_set_symbol does on Tradingview

AI agents invoke chart_set_symbol 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 chart_set_symbol needs a policy

This tool interacts with an external application (TradingView Desktop) through Chrome DevTools Protocol to modify the active chart's symbol. It is not a simple data write within a database, but rather an action that drives UI/state changes in an external running process, making it Execute. Misuse could cause unintended chart navigation or disrupt active trading analysis workflows.

From the tool's definition 'Change the chart symbol' — triggers an external operation on the locally running TradingView Desktop app via Chrome DevTools Protocol

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chart_set_symbol Rate-limited

chart_set_symbol 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": {
    "chart_set_symbol": {
      "limits": [
        {
          "counter": "chart_set_symbol_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 chart_set_symbol

What does the chart_set_symbol tool do? +

Change the chart symbol. 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 chart_set_symbol? +

Register the Tradingview MCP server in PolicyLayer and add a rule for chart_set_symbol: 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 chart_set_symbol? +

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

Can I rate-limit chart_set_symbol? +

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

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

chart_set_symbol 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.