Cancel an existing order
AI agents call cancelOrder to permanently remove resources in TradeStation MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling an order is an irreversible action in a financial trading context. Once cancelled, the order cannot be reinstated; a new order must be placed. This sits at the intersection of Destructive (irreversible action) and Financial (trading context). Per the rules, Financial > Destructive, but cancelling an order does not itself move money or commit financial obligations — it removes a pending one.
From the tool's definition cancelOrder - 'Cancel an existing order'
Attacks that exploit this kind of access
Cancel an existing order. It is categorised as a Destructive tool in the TradeStation MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the TradeStation MCP Server MCP server in PolicyLayer and add a rule for cancelOrder: 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 TradeStation MCP Server. Nothing to install.
cancelOrder 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 cancelOrder 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 cancelOrder. 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.
cancelOrder is provided by the TradeStation MCP Server MCP server (maven81g/tradestation_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.
Teams ship this data inside their own products. See what a licence covers →