chart_set_type · Tradingview MCP: Risk & Policy

WHAT IT DOES

What chart_set_type does on Tradingview

AI agents invoke chart_set_type 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_type needs a policy

This tool modifies the state of an external application (TradingView Desktop) by changing the chart type. It is not a simple data write to a database but rather an action that drives UI/application behavior through CDP. It falls under Execute as it triggers an external operation whose effects depend on arguments. Misuse could disrupt an analyst's workflow or chart configuration, giving it medium severity.

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

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chart_set_type Rate-limited

chart_set_type 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_type": {
      "limits": [
        {
          "counter": "chart_set_type_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_type

What does the chart_set_type tool do? +

Change chart type. 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_type? +

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

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

Can I rate-limit chart_set_type? +

Yes. Add a rate_limit block to the chart_set_type 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_type completely? +

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

chart_set_type 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.