Cancel an in-progress OpenPrints order and issue a full refund to the pre-paid account balance. Only orders that have not yet entered production can be cancelled. This action is irreversible.
AI agents call cancel_order to permanently remove resources in OpenPrints MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
While the tool does reverse a financial transaction (refund), the primary destructive aspect is that it irreversibly cancels an order—an action that cannot be undone once the order enters production. The refund mechanism is secondary to the core destructive operation.
From the tool's definition Tool description states: 'Cancel an in-progress OpenPrints order and issue a full refund' and 'This action is irreversible.' Cancellation of orders is a destructive action that permanently removes/voids an order state.
Attacks that exploit this kind of access
Cancel an in-progress OpenPrints order and issue a full refund to the pre-paid account balance. Only orders that have not yet entered production can be cancelled. This action is irreversible. It is categorised as a Destructive tool in the OpenPrints MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the OpenPrints 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 OpenPrints MCP. 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 OpenPrints MCP server (openprints/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
cancel_order is one line of OpenPrints's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →