Delete a company currency. DELETE /currencies/{companyCurrencyId}. Fails if currency is in use (invoices, subscriptions, transactions, or gateways).
AI agents call delete_currency to permanently remove resources in Rebillia MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting a currency is an irreversible destructive action that removes data from the billing system. While the system has safeguards (fails if currency is in use), the tool's primary function is permanent deletion. This ranks as Destructive rather than Write because deletion cannot be undone.
From the tool's definition Tool name contains 'delete_currency' and description explicitly states 'Delete a company currency' with DELETE HTTP method. This is an irreversible deletion operation.
Attacks that exploit this kind of access
Delete a company currency. DELETE /currencies/{companyCurrencyId}. Fails if currency is in use (invoices, subscriptions, transactions, or gateways). It is categorised as a Destructive tool in the Rebillia MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for delete_currency: 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 Rebillia MCP Server. Nothing to install.
delete_currency 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 delete_currency 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 delete_currency. 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.
delete_currency is provided by the Rebillia MCP Server MCP server (rhinosaas/rebillia-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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