Jira always returns all the fields

[tosokr]

Hi, before creating an issue I want to verify my understanding. I am calling jira_get_sprint_issues function with args: {"sprint_id": "94977", "fields": "summary,assignee,parent", "limit": 50}. The function returns all the fields. This is causing the problem because we have many custom fields, which means a huge token consumption. I checked the code and it looks to me that this is the expected behaivour. If that is the case, what is the purpose of the fields parameter? Am I missing something?