Cancel a pending price on a POI, resetting it to IDLE state. ISV Authentication: Uses ISV JWT with merchant partner ID and OAuth2 token. Endpoint: DELETE /poi/{poiId}/price Use Case: Cancel a price that was set but customer didn
AI agents call payware_poi_cancel_price to permanently remove resources in Payware MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool performs an irreversible state change—canceling a pending price that was previously set. While not directly moving money, it destroys/clears transaction data in a payment system. The DELETE HTTP verb and 'cancel' operation semantics confirm this is a destructive action that cannot be undone without recreating the price.
From the tool's definition Tool name contains 'cancel'; description states 'Cancel a pending price on a POI, resetting it to IDLE state.' The endpoint uses HTTP DELETE method. This operation irreversibly removes or clears a price from a point-of-interaction (POI) device.
Attacks that exploit this kind of access
Cancel a pending price on a POI, resetting it to IDLE state. ISV Authentication: Uses ISV JWT with merchant partner ID and OAuth2 token. Endpoint: DELETE /poi/{poiId}/price Use Case: Cancel a price that was set but customer didn. It is categorised as a Destructive tool in the Payware MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Payware MCP Server MCP server in PolicyLayer and add a rule for payware_poi_cancel_price: 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 Payware MCP Server. Nothing to install.
payware_poi_cancel_price 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 payware_poi_cancel_price 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 payware_poi_cancel_price. 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.
payware_poi_cancel_price is provided by the Payware MCP Server MCP server (payware/mcp-server). 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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