# Delete customiser font tier (`delete_customiser_font_tier`)

Deletes one font tier of a customiser permanently, so the call requires confirm true and changes nothing without it. A tier that a font or the icon settings still price by is refused with resource_in_use, which lists the referencing records; references are never cleared silently. Calling with dry_run true first returns the same verdict without deleting anything. The result carries the tier as it was. It requires the pricing:write scope and an idempotency_key.

- Source URL: https://www.signcustomiser.com/help/mcp/tools/delete_customiser_font_tier/
- Markdown URL: https://www.signcustomiser.com/help/mcp/tools/delete_customiser_font_tier.md
- MCP endpoint: https://mcp.signcustomiser.com
- Required scope: `pricing:write`
- Behaviour: destructive write

## Purpose

Remove a font tier that no font prices by any more, after the merchant has agreed to it.

## Annotations

| Hint | Value |
| --- | --- |
| readOnlyHint | false |
| destructiveHint | true |
| idempotentHint | true |
| openWorldHint | false |

## Prerequisites

- A customiser id from list_customisers and a font tier id from list_customiser_font_tiers.
- The merchant explicit agreement, sent as confirm true.
- A merchant has connected this store and approved the pricing:write scope.

## Side effects

- Deletes one font tier and its rows permanently.
- Clears the customiser cached storefront configuration.
- Spends one unit of the store option-write budget.
- Claims the idempotency_key for at least 24 hours.

## Arguments

| Property | Type | Required | Description |
| --- | --- | --- | --- |
| `customiser_id` | integer | yes | The customiser id, from list_customisers. |
| `font_tier_id` | integer | yes | The font tier id, from list_customiser_font_tiers. |
| `confirm` | boolean | unless `dry_run` is true | Must be true to apply the change, because the price list and its rows are removed permanently and cannot be restored through this connector. Without it the call returns a confirmation_required error and changes nothing. |
| `idempotency_key` | string | unless `dry_run` is true | A client-generated key unique to this logical write, such as a UUID. Required: repeating the call with the same key and the same arguments replays the original result instead of writing twice, and the same key with different arguments is an idempotency_key_conflict. |
| `dry_run` | boolean | no | When true, the deletion is checked against every font and setting that still prices by the tier is checked and nothing is written: the result is the same verdict the apply would have reached, and a problem the apply would have raised comes back as the same tool error. Defaults to false. A dry run claims no key. A dry run does not require the confirm argument. |

## Result

The deleted tier id and the tier as it was, with every row. A dry run returns the delete verdict instead and deletes nothing.

| Property | Type | Required | Description |
| --- | --- | --- | --- |
| `request_id` | string | yes |  |
| `store` | object | yes |  |
| `store.id` | integer | yes |  |
| `store.name` | string | yes |  |
| `customiser_id` | integer | yes |  |
| `font_tier_id` | integer | yes |  |
| `deleted` | boolean | no | True when the tier was deleted. Absent on a dry run, where nothing is deleted. |
| `font_tier` | object | no | The tier as it was when it was deleted, so the caller can report or recreate it. Absent on a dry run. |
| `font_tier.id` | integer | yes |  |
| `font_tier.customiser_id` | integer | yes |  |
| `font_tier.name` | string or null | no |  |
| `font_tier.letter_pricing_mode` | string or null | no | One of: `every_letter_cost`, `price_by_position`. |
| `font_tier.currency` | string or null | no | The ISO 4217 currency of every integer minor-unit amount on the record. |
| `font_tier.rows` | array of object | no |  |
| `font_tier.rows[].size_id` | integer or null | no |  |
| `font_tier.rows[].base_price` | object | no |  |
| `font_tier.rows[].letter_price` | object | no |  |
| `font_tier.rows[].letter_price_by_position` | object or null | no |  |
| `font_tier.created_at` | string or null | no |  |
| `font_tier.updated_at` | string or null | no |  |
| `idempotent_replay` | boolean | no | True when this call replayed a previously recorded response for the same idempotency_key instead of applying the write again. |
| `dry_run` | boolean | no | Present and true only when dry_run was requested. |
| `valid` | boolean | no | Present only on a dry run, and always true: a failing dry run returns a tool error instead. |
| `verdict` | object | no | Present only on a dry run: the delete verdict. |

## Error cases

| Code | Recovery |
| --- | --- |
| `confirmation_required` | Send confirm true once the merchant has agreed to the deletion. Nothing was deleted. |
| `idempotency_subject_changed` | The tier lifecycle changed after the recorded deletion. Issue a new key and re-check the resource before writing again. |
| `insufficient_scope` | The connection was approved without pricing:write. |
| `rate_limited` | The store option-write budget is spent. Wait retry_after seconds. |
| `resource_in_use` | A font or the icon settings still price by this tier. referenced_by lists them; move them to another tier first. |
| `resource_not_found` | No font tier with that id belongs to that customiser in this store. |

## Example: Delete a tier the merchant confirmed

Request:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "delete_customiser_font_tier",
    "arguments": {
      "customiser_id": 42,
      "font_tier_id": 7,
      "confirm": true,
      "idempotency_key": "a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d"
    }
  }
}
```

Response:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "structuredContent": {
      "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t",
      "store": {
        "id": 12,
        "name": "Demo Signs"
      },
      "customiser_id": 42,
      "font_tier_id": 7,
      "deleted": true,
      "font_tier": {
        "id": 7,
        "customiser_id": 42,
        "name": "Standard",
        "letter_pricing_mode": "every_letter_cost",
        "currency": "USD",
        "rows": [],
        "created_at": "2026-08-13T00:00:00Z",
        "updated_at": "2026-08-13T00:00:00Z"
      },
      "idempotent_replay": false
    }
  }
}
```

## Example: Without confirmation nothing is deleted (error)

Request:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "delete_customiser_font_tier",
    "arguments": {
      "customiser_id": 42,
      "font_tier_id": 7,
      "confirm": false,
      "idempotency_key": "a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d"
    }
  }
}
```

Response:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "isError": true,
    "structuredContent": {
      "error": {
        "code": "confirmation_required",
        "title": "Confirmation required",
        "detail": "Deleting font tier 7 removes the price list and its rows permanently.",
        "recovery": "This operation changes something consequential. Send confirm: true once the merchant has agreed to it.",
        "parameter": "confirm",
        "allowed_values": [
          "true"
        ]
      }
    }
  }
}
```