ig_add_to_watchlist · IG Trading MCP: Risk & Policy

WHAT IT DOES

What ig_add_to_watchlist does on IG Trading MCP

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

WHY IT NEEDS A POLICY

Why ig_add_to_watchlist needs a policy

This tool modifies user data (watchlist contents) by adding an instrument epic, which constitutes a Write operation. While on a financial trading platform, the action itself does not move money or create financial obligations—it merely organizes trading instruments for monitoring.

From the tool's definition Tool name 'ig_add_to_watchlist' and description 'Add an epic to a watchlist' indicate creation/modification of watchlist data. The action is reversible (items can be removed from watchlists).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ig_add_to_watchlist Rate-limited

ig_add_to_watchlist 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": {
    "ig_add_to_watchlist": {
      "limits": [
        {
          "counter": "ig_add_to_watchlist_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 IG Trading MCP, so you can run agents against it safely.

FAQ

Questions about ig_add_to_watchlist

What does the ig_add_to_watchlist tool do? +

Add an epic to a watchlist. It is categorised as a Write tool in the IG Trading 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 ig_add_to_watchlist? +

Register the IG Trading MCP server in PolicyLayer and add a rule for ig_add_to_watchlist: 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 IG Trading MCP. Nothing to install.

What risk level is ig_add_to_watchlist? +

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

Can I rate-limit ig_add_to_watchlist? +

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

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

ig_add_to_watchlist is provided by the IG Trading MCP server (kea0811/ig-trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.