Source: https://atomic-works-test.docs-staging.pageloop.ai/mcp-tools/requests-tickets/other/initiate-approval-by-policy

# initiateApprovalByPolicy

Initiate an approval on a request (descriptor or policy).

Starts a new approval lifecycle on an existing REQUEST ticket. Pass
EITHER `approval_descriptor` (from `getIgaResolvedEntitlements`) OR
`policy_id`. Approvers and criteria come from the referenced policy —
you do not pass them in this call.

## Parameters

| Name                  | Type    | Required | Description                                                              |
| --------------------- | ------- | -------- | ------------------------------------------------------------------------ |
| `requestId`           | string  | Yes      | The request display ID to initiate approval on (e.g., REQ-123, INC-456). |
| `policy_id`           | integer | No       | Numeric id of a saved REQUEST or GLOBAL approval policy. Discover via    |
| `approval_descriptor` | object  | No       |                                                                          |
| `name`                | string  | No       | Optional human-readable label for the lifecycle. Defaults to the         |