watchlist_add · TradingView MCP: Risk & Policy

WHAT IT DOES

What watchlist_add does on TradingView MCP

AI agents use watchlist_add 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 watchlist_add needs a policy

Adding a symbol to a watchlist is a reversible modification operation. It creates or appends data to an existing list without destructive effects. The user can easily remove the symbol later. Impact is limited to the user's personal watchlist state and has no financial, security, or external system consequences. Low severity because misuse would only clutter a watchlist, causing minor inconvenience.

From the tool's definition Tool name 'watchlist_add' and description 'Add a symbol to the TradingView watchlist' indicate a create/modify operation on user watchlist data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

watchlist_add Rate-limited

watchlist_add 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": {
    "watchlist_add": {
      "limits": [
        {
          "counter": "watchlist_add_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 watchlist_add

What does the watchlist_add tool do? +

Add a symbol to the TradingView watchlist. 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 watchlist_add? +

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

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

Can I rate-limit watchlist_add? +

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

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

watchlist_add 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.