ig_switch_account · IG Trading MCP: Risk & Policy

WHAT IT DOES

What ig_switch_account does on IG Trading MCP

AI agents use ig_switch_account 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_switch_account needs a policy

Switching accounts is a reversible write operation that changes which account subsequent trading operations target. While not destructive or financial in itself, it modifies application state and has high severity because an AI agent switching to an unintended account could cause trades to execute on the wrong account, resulting in unintended financial exposure or losses.

From the tool's definition Tool name 'ig_switch_account' and description 'Switch to a different trading account' indicate modification of account state/context.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ig_switch_account Rate-limited

ig_switch_account 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_switch_account": {
      "limits": [
        {
          "counter": "ig_switch_account_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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_switch_account

What does the ig_switch_account tool do? +

Switch to a different trading account. 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_switch_account? +

Register the IG Trading MCP server in PolicyLayer and add a rule for ig_switch_account: 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_switch_account? +

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

Can I rate-limit ig_switch_account? +

Yes. Add a rate_limit block to the ig_switch_account 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_switch_account completely? +

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

ig_switch_account 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.