Removes a recorded payment from an invoice. REST DELETE
AI agents call wave_delete_invoice_payment to permanently remove resources in Waveapps — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes payment records from invoices, which cannot be undone and directly impacts financial accounting integrity. While not a direct money transfer (not Financial), it is destructive of critical financial data. The high severity reflects the potential for an AI agent to accidentally or maliciously erase legitimate payment records, creating accounting discrepancies and audit trail gaps.
From the tool's definition Tool name explicitly states 'delete' and description confirms 'Removes a recorded payment' via 'REST DELETE'. This irreversibly deletes financial transaction records.
Attacks that exploit this kind of access
Removes a recorded payment from an invoice. REST DELETE. It is categorised as a Destructive tool in the Waveapps MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Waveapps MCP server in PolicyLayer and add a rule for wave_delete_invoice_payment: 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 Waveapps. Nothing to install.
wave_delete_invoice_payment 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 wave_delete_invoice_payment 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 wave_delete_invoice_payment. 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.
wave_delete_invoice_payment is provided by the Waveapps MCP server (lunaparker/waveapps-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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