servicetitan_void_invoice
Void an invoice
This record as markdown: /tools/busybee3333-servicetitan-mcp-2026-complete/servicetitan-void-invoice.md
What servicetitan_void_invoice does on ServiceTitan MCP Server
AI agents call servicetitan_void_invoice to permanently remove resources in ServiceTitan MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why servicetitan_void_invoice is rated Critical
Voiding an invoice is a destructive operation in accounting contexts: it permanently cancels the invoice, removes it from receivables, and cannot be reversed (unlike editing or deleting a draft). This has significant financial record-keeping implications and a high blast radius if misused, as it affects billing, revenue recognition, and customer accounts.
From the tool's definition 'Void an invoice' — voiding an invoice is an irreversible financial/accounting action that nullifies the invoice record and cannot be undone
Attacks that exploit this kind of access
The rule that runs servicetitan_void_invoice safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceTitan MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For servicetitan_void_invoice, this is the rule to start with:
servicetitan_void_invoice is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect ServiceTitan MCP Server, apply this rule, and every servicetitan_void_invoice call is checked against it from then on.
Questions about servicetitan_void_invoice
Void an invoice. It is categorised as a Destructive tool in the ServiceTitan MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the ServiceTitan MCP Server MCP server in PolicyLayer and add a rule for servicetitan_void_invoice: 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 ServiceTitan MCP Server. Nothing to install.
servicetitan_void_invoice 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 servicetitan_void_invoice 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 servicetitan_void_invoice. 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.
servicetitan_void_invoice is provided by the ServiceTitan MCP Server MCP server (busybee3333/servicetitan-mcp-2026-complete). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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