Delete a purchase invoice
AI agents call siigo_delete_purchase to permanently remove resources in Siigo MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting a purchase invoice in an accounting system is an irreversible action that removes important financial records. This could cause audit trail breaks, compliance issues, and financial discrepancies. An AI agent misusing this tool could systematically delete purchase records, causing severe damage to financial records.
From the tool's definition Tool name 'siigo_delete_purchase' combined with description 'Delete a purchase invoice' indicates irreversible deletion of accounting data.
Attacks that exploit this kind of access
Delete a purchase invoice. It is categorised as a Destructive tool in the Siigo MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Siigo MCP Server MCP server in PolicyLayer and add a rule for siigo_delete_purchase: 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 Siigo MCP Server. Nothing to install.
siigo_delete_purchase 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 siigo_delete_purchase 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 siigo_delete_purchase. 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.
siigo_delete_purchase is provided by the Siigo MCP Server MCP server (jdlar1/siigo-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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