chart_pan · TradingView MCP: Risk & Policy

WHAT IT DOES

What chart_pan does on TradingView MCP

AI agents invoke chart_pan to trigger actions in TradingView MCP. 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_pan needs a policy

This tool executes a browser-level interaction (panning the chart) via Chrome DevTools Protocol. It doesn't read, write, or delete data, nor does it involve finances — it performs an external operation (UI manipulation) whose effect depends on the argument (number of bars). Classified as Execute with medium severity since misuse affects chart navigation/view state but has limited blast radius.

From the tool's definition 'Pan the chart by N bars. Positive bars = right (newer), negative = left (older)' — triggers a UI/browser action via Chrome DevTools Protocol to manipulate the chart view

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chart_pan Rate-limited

chart_pan 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_pan": {
      "limits": [
        {
          "counter": "chart_pan_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, so you can run agents against it safely.

FAQ

Questions about chart_pan

What does the chart_pan tool do? +

Pan the chart by N bars. Positive bars = right (newer), negative = left (older). Use for. It is categorised as a Execute tool in the TradingView MCP 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_pan? +

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

What risk level is chart_pan? +

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

Can I rate-limit chart_pan? +

Yes. Add a rate_limit block to the chart_pan 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_pan completely? +

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

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