Update an existing Jira issue. Before updating an issue with custom fields, use the 'Get Create Meta Data' tool with your project key to understand: 1. Available fields for the issue type 2. Required fields that must be preserved 3. Custom fields format and allowed values Note: When updating an issue, you only need to provide the fields you want to change. Omitted fields will retain their current values.

Create a new Jira issue. Before creating an issue, use the 'Get Create Meta Data' tool with your project key to get: 1. Available issue types and their IDs 2. Required and optional fields for each issue type 3. Custom fields configuration and allowed values This meta data is essential as different projects and issue types may have different required fields.