# PurchaseOrdersMarkup_Update

A write tool on the ServiceTitan MCP Server MCP server.

Agent View of the PolicyLayer registry record for `PurchaseOrdersMarkup_Update`. HTML page: https://policylayer.com/tools/jordandalton-servicetitanmcpserver/purchaseordersmarkup-update

## Facts

- Tool: `PurchaseOrdersMarkup_Update`
- 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": "PurchaseOrdersMarkup_Update",
    "arguments": {}
  }
}
```

## Why PurchaseOrdersMarkup_Update is rated Medium

The tool appears to modify purchase order markup data, which is reversible data modification (Write category). Severity is medium because unauthorized markup adjustments could lead to incorrect pricing/profitability but are not irreversible deletions (not Destructive) or financial transactions (not Financial).

From the tool's own definition: "Tool name 'PurchaseOrdersMarkup_Update' contains 'Update' verb, indicating modification of existing data. Description is empty, but 'Markup' and 'Update' strongly suggest adjusting pricing or financial markup data on purchase orders."

## Use case

AI agents use PurchaseOrdersMarkup_Update 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": {
    "PurchaseOrdersMarkup_Update": {
      "limits": [
        {
          "counter": "purchaseordersmarkup_update_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