purchase_orders_cancel
AI agents call purchase_orders_cancel to permanently remove resources in ServiceTitan MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
An AI agent that decides to call purchase_orders_cancel doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from ServiceTitan MCP Server is gone — there is no undo for destructive operations.
Attacks that exploit this kind of access
purchase_orders_cancel. It is categorised as a Destructive tool in the ServiceTitan MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the ServiceTitan MCP Server MCP server in PolicyLayer and add a rule for purchase_orders_cancel: 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 ServiceTitan MCP Server. Nothing to install.
purchase_orders_cancel 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 purchase_orders_cancel 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 purchase_orders_cancel. 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.
purchase_orders_cancel is provided by the ServiceTitan MCP Server MCP server (jordandalton/servicetitanmcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.