The Custom Sheet Function Creator

Creates a custom function for Google Sheets to perform a unique, repeatable action without manual work.
Prompt
Act as a Google Sheets formula expert. I need a custom function for Google Sheets. Function Name: [e.g., SUMMARIZE_REVIEW] Input: A cell containing text (e.g., A2). Action: "[e.g., Analyze the text of the customer review and return a one-sentence summary of the main sentiment and topic.]" Provide the Apps Script code to create this custom function.