chart_compare_symbol · TradingView MCP: Risk & Policy

WHAT IT DOES

What chart_compare_symbol does on TradingView MCP

AI agents use chart_compare_symbol to create or update resources in TradingView MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your TradingView MCP environment.

WHY IT NEEDS A POLICY

Why chart_compare_symbol needs a policy

The tool creates or modifies chart layout by overlaying a comparison symbol on an existing chart. This is reversible (the overlay can be removed via standard TradingView UX or API), affects no data outside the current chart session, has no financial impact, and does not execute arbitrary code or delete anything.

From the tool's definition Tool modifies chart state by adding a compare symbol overlay via the 'Add' action (native TradingView feature), creating a new chart element that persists until removed.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chart_compare_symbol Rate-limited

chart_compare_symbol stays usable, but capped — an agent stuck in a loop can't make hundreds of changes 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_compare_symbol": {
      "limits": [
        {
          "counter": "chart_compare_symbol_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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_compare_symbol

What does the chart_compare_symbol tool do? +

Add a compare symbol overlay on the current chart (TradingView native Compare feature). The secondary symbol shares the same axis. It is categorised as a Write tool in the TradingView MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on chart_compare_symbol? +

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

What risk level is chart_compare_symbol? +

chart_compare_symbol is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit chart_compare_symbol? +

Yes. Add a rate_limit block to the chart_compare_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_compare_symbol completely? +

Set action: deny in the PolicyLayer policy for chart_compare_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_compare_symbol? +

chart_compare_symbol 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.