curl --request GET \
  --url https://api.letpiper.com/v1/orgs/{org_id}/knowledge/documents/{document_id}/bookmark \
  --header 'Authorization: Bearer <token>'

{
  "bookmarkMode": "none",
  "usageDescription": "<string>",
  "agentIds": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}