ibkr_cancel_order

THE RISK

Critical Risk

Why ibkr_cancel_order needs a policy

Cancelling a brokerage order has direct financial implications — it modifies active trading instructions on a live brokerage account (Interactive Brokers). While it doesn't move money directly, cancelling an order can affect executed trades, open positions, and hedging strategies, making it a financial action. The 'confirm=true' requirement underscores the sensitivity of the operation.

From the tool's definition Cancel a single IBKR order by orderId

Documented attack patterns abuse exactly the kind of access ibkr_cancel_order gives an agent:

POLICY

How to control ibkr_cancel_order

PolicyLayer is an MCP gateway — it sits between your AI agents and Ibkr, and nothing reaches the server without passing your rules. This is the rule we recommend for ibkr_cancel_order:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ibkr_cancel_order": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to ibkr_cancel_order is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register Ibkr — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More Ibkr tools

Financial ibkr_exercise_options Exercise or lapse an options contract. Requires confirm=true. Financial ibkr_place_order Place an IBKR order. Defaults to dry_run=true and transmit=false for safety. Destructive ibkr_global_cancel Cancel all active IBKR orders. Requires confirm=true. Execute ibkr_preview_order Run IBKR what-if analysis for an order and return margin/commission impact. Execute ibkr_run_scanner Run a market scanner subscription and return ranked results. Read ibkr_debug_market_data_snapshot Return diagnostic market data snapshots for a contract. Read ibkr_get_account_summary Return account summary values such as NetLiquidation and BuyingPower. Read ibkr_get_account_values Return account values snapshot for the specified account.

All 33 Ibkr tools →

Financial tools on other servers

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Go deeper

Critical-risk tools in Ibkr → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about ibkr_cancel_order

What does the ibkr_cancel_order tool do? +

Cancel a single IBKR order by orderId. Requires confirm=true. It is categorised as a Financial tool in the Ibkr MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on ibkr_cancel_order? +

Register the Ibkr MCP server in PolicyLayer and add a rule for ibkr_cancel_order: 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 Ibkr. Nothing to install.

What risk level is ibkr_cancel_order? +

ibkr_cancel_order is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit ibkr_cancel_order? +

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

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

ibkr_cancel_order is provided by the Ibkr MCP server (patrickpxp/ibkr-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ibkr tool call.

Start from Ibkr, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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