Cancel an existing order
AI agents call cancel_order to permanently remove resources in Interactive Brokers MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Although this server also contains Financial tools (place_order), cancel_order is categorized as Destructive because it irreversibly modifies the state of a financial order in a way that cannot be reversed. The order, once cancelled, cannot be restored to its prior pending state without user re-entry.
From the tool's definition The tool name is 'cancel_order' with description 'Cancel an existing order'. Cancellation of financial orders is an irreversible action that terminates an existing trade instruction and cannot be undone—the order state is permanently changed from active to…
Attacks that exploit this kind of access
Cancel an existing order. It is categorised as a Destructive tool in the Interactive Brokers MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Interactive Brokers MCP Server MCP server in PolicyLayer and add a rule for 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 Interactive Brokers MCP Server. Nothing to install.
cancel_order is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the 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.
Set action: deny in the PolicyLayer policy for 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.
cancel_order is provided by the Interactive Brokers MCP Server MCP server (jinyiabc/ibkr-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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