# brc_update_prepayment

Updates an existing parent Prepayment by id. Use brc_get_prepayment first to retrieve the current prepayment and timestamp. Child prepayments are not exposed by the public API. Do not call with confirmWrite=true until the user has reviewed the preview and explicitly confirmed the update. Requires routeToken from brc_route_request for the matching action workflow. Call brc_route_request first with the user's complete original action request. Retain the returned routeToken through lookup, preview, and confirmation, and pass the same token on the final permitted transactional tool call. Never invent a placeholder token. A routeToken is not permission to post — preview-before-posting and confirmWrite/confirmDelete still apply.

Agent View of the PolicyLayer registry record for `brc_update_prepayment`. HTML page: https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-update-prepayment

## Facts

- Tool: `brc_update_prepayment`
- Server: Red by Big Red Cloud (`https://red.bigredcloud.com/mcp`) — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server.md
- Homepage: https://github.com/BigRedCloud/red-mcp-server
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 12 (9 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | integer | yes | Parent prepayment id. |
| `total` | number | yes | Prepayment total amount. |
| `acCode` | string | yes | Nominal account code, for example 4000. |
| `procDate` | string | yes | Processing date, for example 2024-03-15T00:00:00. |
| `entryDate` | string | yes | Entry date, for example 2024-03-01T00:00:00. |
| `reference` | string | yes | Prepayment reference, for example PRE0001. |
| `timestamp` | string | yes | Base64 timestamp returned by the prepayment, for example bgUcQIbL3gg=. |
| `routeToken` | string | yes | Opaque routeToken from brc_route_request for this action workflow. Required for transactional tools. Routing permission only — does not replace preview-before-p |
| `companyName` | string | yes | Company context name, for example YOUR-COMPANY-NAME. |
| `firstDetail` | string | no | First detail text. |
| `confirmWrite` | boolean | no | Must be true only after the user explicitly confirms updating this prepayment. |
| `secondDetail` | string | no | Second detail text. |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "brc_update_prepayment",
    "arguments": {
      "id": 0,
      "total": 0,
      "acCode": "<acCode>",
      "procDate": "<procDate>",
      "entryDate": "<entryDate>",
      "reference": "<reference>",
      "timestamp": "<timestamp>",
      "routeToken": "<routeToken>",
      "companyName": "<companyName>"
    }
  }
}
```

## Why brc_update_prepayment is rated Medium

An AI agent can call brc_update_prepayment faster than any human can review: one bad instruction and it creates or modifies resources in Red by Big Red Cloud by the hundred, each call as confident as the last.

Risk signals: High parameter count (13 properties)

## Use case

AI agents use brc_update_prepayment to create or update resources in Red by Big Red Cloud, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Red by Big Red Cloud environment.

## Recommended policy (PolicyLayer)

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

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

## Other tools on Red by Big Red Cloud (158)

- `brc_clear_all_company_api_keys` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-clear-all-company-api-keys.md
- `brc_clear_audit_log` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-clear-audit-log.md
- `brc_clear_company_api_key` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-clear-company-api-key.md
- `brc_delete_accrual` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-accrual.md
- `brc_delete_allocation_resolver` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-allocation-resolver.md
- `brc_delete_bank_account` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-bank-account.md
- `brc_delete_cash_payment` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-cash-payment.md
- `brc_delete_cash_receipt` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-cash-receipt.md
- `brc_delete_customer` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-customer.md
- `brc_delete_nominal_journal_batch` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-nominal-journal-batch.md
- `brc_delete_payment` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-payment.md
- `brc_delete_prepayment` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-prepayment.md
- `brc_delete_product` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-product.md
- `brc_delete_purchase` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-purchase.md
- `brc_delete_quote` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-quote.md
- `brc_delete_sales_credit_note` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-sales-credit-note.md
- `brc_delete_sales_entry` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-sales-entry.md
- `brc_delete_sales_invoice` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-sales-invoice.md
- `brc_delete_sales_rep` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-sales-rep.md
- `brc_delete_supplier` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-delete-supplier.md
- `brc_red_help` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-red-help.md
- `brc_route_request` — Destructive — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-route-request.md
- `brc_getting_started` — Execute — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-getting-started.md
- `brc_start_company_connection` — Execute — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-start-company-connection.md
- `brc_create_payment` — Financial — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-create-payment.md
- `brc_batch_cash_payments` — Read — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-batch-cash-payments.md
- `brc_batch_cash_receipts` — Read — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-batch-cash-receipts.md
- `brc_batch_customers` — Read — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-batch-customers.md
- `brc_batch_payments` — Read — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-batch-payments.md
- `brc_batch_products` — Read — https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server/brc-batch-products.md
- …and 128 more: https://policylayer.com/tools/io-github-bigredcloud-red-mcp-server.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=io-github-bigredcloud-red-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-bigredcloud-red-mcp-server