pine_save · TradingView MCP: Risk & Policy

WHAT IT DOES

What pine_save does on TradingView MCP

AI agents use pine_save 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 pine_save needs a policy

This tool creates or modifies data reversibly by saving Pine Script code to storage. While saving itself is not destructive, it writes/persists changes to a script resource. The severity is medium because misuse could overwrite legitimate trading scripts or introduce malicious Pine Script logic, but the effect is reversible (prior versions may exist, scripts can be edited or restored).

From the tool's definition pine_save performs a save operation (Ctrl+S) on Pine Script code. The description indicates it modifies/persists the current Pine Script.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pine_save Rate-limited

pine_save 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": {
    "pine_save": {
      "limits": [
        {
          "counter": "pine_save_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 pine_save

What does the pine_save tool do? +

Save the current Pine Script (Ctrl+S). 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 pine_save? +

Register the TradingView MCP server in PolicyLayer and add a rule for pine_save: 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 pine_save? +

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

Can I rate-limit pine_save? +

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

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

pine_save 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.