# evidence_storno

Cancel (storno) a document record in any AbraFlexi evidence.

Agent View of the PolicyLayer registry record for `evidence_storno`. HTML page: https://policylayer.com/tools/abraflexi/evidence-storno

## Facts

- Tool: `evidence_storno`
- Server: AbraFlexi (`abraflexi-mcp-server`) — https://policylayer.com/tools/abraflexi.md
- Install: `npx -y abraflexi-mcp-server`
- Homepage: https://github.com/VitexSoftware/abraflexi-mcp-server
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity verified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

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

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

## Why evidence_storno is rated Critical

Canceling/reversing document records is irreversible accounting operation that affects historical records and financial data integrity. While not a hard delete, a storno is a permanent accounting reversal that cannot be undone—it creates an offsetting entry.

From the tool's own definition: "Tool name 'evidence_storno' and description 'Cancel (storno) a document record in any AbraFlexi evidence.' The term 'storno' in accounting means to reverse or cancel a transaction, which modifies or nullifies existing records."

## Use case

AI agents call evidence_storno to permanently remove resources in AbraFlexi, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

## Recommended policy (PolicyLayer)

Verdict: **Hidden**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches AbraFlexi:

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "evidence_storno"
  ]
}
```

## Other tools on AbraFlexi (63)

- `contact_delete` — Destructive — https://policylayer.com/tools/abraflexi/contact-delete.md
- `evidence_delete` — Destructive — https://policylayer.com/tools/abraflexi/evidence-delete.md
- `evidence_delete_attachment` — Destructive — https://policylayer.com/tools/abraflexi/evidence-delete-attachment.md
- `invoice_issued_delete` — Destructive — https://policylayer.com/tools/abraflexi/invoice-issued-delete.md
- `invoice_issued_unlink_zdd` — Destructive — https://policylayer.com/tools/abraflexi/invoice-issued-unlink-zdd.md
- `product_delete` — Destructive — https://policylayer.com/tools/abraflexi/product-delete.md
- `evidence_perform_action` — Execute — https://policylayer.com/tools/abraflexi/evidence-perform-action.md
- `bank_transaction_create` — Financial — https://policylayer.com/tools/abraflexi/bank-transaction-create.md
- `invoice_issued_cash_payment` — Financial — https://policylayer.com/tools/abraflexi/invoice-issued-cash-payment.md
- `invoice_issued_deduct_advance` — Financial — https://policylayer.com/tools/abraflexi/invoice-issued-deduct-advance.md
- `invoice_issued_deduct_zdd` — Financial — https://policylayer.com/tools/abraflexi/invoice-issued-deduct-zdd.md
- `invoice_issued_match_payment` — Financial — https://policylayer.com/tools/abraflexi/invoice-issued-match-payment.md
- `invoice_issued_link_zdd` — Other — https://policylayer.com/tools/abraflexi/invoice-issued-link-zdd.md
- `bank_transaction_get` — Read — https://policylayer.com/tools/abraflexi/bank-transaction-get.md
- `call_user_query` — Read — https://policylayer.com/tools/abraflexi/call-user-query.md
- `changes_get` — Read — https://policylayer.com/tools/abraflexi/changes-get.md
- `changes_status` — Read — https://policylayer.com/tools/abraflexi/changes-status.md
- `contact_get` — Read — https://policylayer.com/tools/abraflexi/contact-get.md
- `contact_get_any_phone` — Read — https://policylayer.com/tools/abraflexi/contact-get-any-phone.md
- `contact_get_bank_accounts` — Read — https://policylayer.com/tools/abraflexi/contact-get-bank-accounts.md
- `contact_get_cell_phone` — Read — https://policylayer.com/tools/abraflexi/contact-get-cell-phone.md
- `contact_get_notification_email` — Read — https://policylayer.com/tools/abraflexi/contact-get-notification-email.md
- `evidence_download_attachment` — Read — https://policylayer.com/tools/abraflexi/evidence-download-attachment.md
- `evidence_get` — Read — https://policylayer.com/tools/abraflexi/evidence-get.md
- `evidence_get_attachment` — Read — https://policylayer.com/tools/abraflexi/evidence-get-attachment.md
- `evidence_get_attachment_thumbnail` — Read — https://policylayer.com/tools/abraflexi/evidence-get-attachment-thumbnail.md
- `evidence_get_labels` — Read — https://policylayer.com/tools/abraflexi/evidence-get-labels.md
- `evidence_get_properties` — Read — https://policylayer.com/tools/abraflexi/evidence-get-properties.md
- `evidence_get_qr_code` — Read — https://policylayer.com/tools/abraflexi/evidence-get-qr-code.md
- `evidence_get_record_changes` — Read — https://policylayer.com/tools/abraflexi/evidence-get-record-changes.md
- …and 33 more: https://policylayer.com/tools/abraflexi.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=abraflexi · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/abraflexi