curl --request GET \
  --url https://{api_endpoint}/api/v1/assistants/custom/{assistant_id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "tenant_id": "<string>",
  "tenant_name": "<string>",
  "title": "<string>",
  "description": "<string>",
  "created_on": "2023-11-07T05:31:56Z",
  "created_by": "<string>",
  "created_by_username": "<string>",
  "updated_at": "2023-11-07T05:31:56Z",
  "tags": [
    "<string>"
  ],
  "name": "<string>",
  "type": "<string>",
  "nickname": "<string>",
  "instructions": "<string>",
  "user_start_messages": [
    "<string>"
  ],
  "llm_name": "<string>",
  "llm_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "context_access_enabled": true,
  "context_variables": []
}