# invoices_update_invoice_items

A write tool on the ServiceTitan MCP Server MCP server.

Agent View of the PolicyLayer registry record for `invoices_update_invoice_items`. HTML page: https://policylayer.com/tools/jordandalton-servicetitanmcpserver/invoices-update-invoice-items

## Facts

- Tool: `invoices_update_invoice_items`
- Server: ServiceTitan MCP Server (`jordandalton/servicetitanmcpserver`) — https://policylayer.com/tools/jordandalton-servicetitanmcpserver.md
- Homepage: https://github.com/JordanDalton/ServiceTitanMcpServer
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "invoices_update_invoice_items",
    "arguments": {}
  }
}
```

## Why invoices_update_invoice_items is rated Medium

This tool modifies invoice item data, which constitutes a Write operation (reversible data modification). While it touches financial documents, it does not move money or create financial obligations itself—that would occur at payment processing. The severity is high because incorrect invoice modifications could cause billing disputes, accounting discrepancies, and customer issues.

From the tool's own definition: "Tool name 'invoices_update_invoice_items' indicates modification of invoice data. The 'update' verb combined with 'invoice_items' context suggests reversible changes to financial records."

## Use case

AI agents use invoices_update_invoice_items to create or update resources in ServiceTitan MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ServiceTitan MCP Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches ServiceTitan MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "invoices_update_invoice_items": {
      "limits": [
        {
          "counter": "invoices_update_invoice_items_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on ServiceTitan MCP Server (453)

- `appointments_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/appointments-delete.md
- `appointments_remove_hold` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/appointments-remove-hold.md
- `bulk_tags_remove_tags` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/bulk-tags-remove-tags.md
- `categories_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/categories-delete.md
- `contact_methods_DeleteContactMethod` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/contact-methods-deletecontactmethod.md
- `contacts_deletecontact` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/contacts-deletecontact.md
- `contacts_deletecontactrelationship` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/contacts-deletecontactrelationship.md
- `customers_delete_contact` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/customers-delete-contact.md
- `customers_delete_note` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/customers-delete-note.md
- `customers_delete_tag` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/customers-delete-tag.md
- `DiscountAndFees_Delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/discountandfees-delete.md
- `equipment_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/equipment-delete.md
- `estimates_delete_item` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/estimates-delete-item.md
- `gross_pay_items_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/gross-pay-items-delete.md
- `invoices_delete_invoice_item` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/invoices-delete-invoice-item.md
- `jobs_cancel` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/jobs-cancel.md
- `jobs_remove_cancellation` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/jobs-remove-cancellation.md
- `locations_delete_contact` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/locations-delete-contact.md
- `locations_delete_note` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/locations-delete-note.md
- `locations_delete_tag` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/locations-delete-tag.md
- `materials_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/materials-delete.md
- `non_job_appointments_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/non-job-appointments-delete.md
- `purchase_orders_cancel` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/purchase-orders-cancel.md
- `purchase_orders_markup_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/purchase-orders-markup-delete.md
- `receipts_cancelreceipts` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/receipts-cancelreceipts.md
- `returns_cancel` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/returns-cancel.md
- `services_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/services-delete.md
- `suppressions_remove` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/suppressions-remove.md
- `team_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/team-delete.md
- `technician_shifts_bulk_delete` — Destructive — https://policylayer.com/tools/jordandalton-servicetitanmcpserver/technician-shifts-bulk-delete.md
- …and 423 more: https://policylayer.com/tools/jordandalton-servicetitanmcpserver.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=jordandalton-servicetitanmcpserver · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/jordandalton-servicetitanmcpserver