1. list_spreadsheets
Lists spreadsheets in the configured Drive folder (Service Account) or accessible by the user (OAuth).
2. create_spreadsheet
Creates a new spreadsheet with the specified title.
3. get_sheet_data
Reads data from a range in a sheet, optionally including formatting metadata.
4. get_sheet_formulas
Reads formulas from a range in a sheet.
5. update_cells
Writes data to a specific range, overwriting existing data.
6. batch_update_cells
Updates multiple ranges in one API call.
7. add_rows
Appends rows to the end of a sheet after the last row with data.
8. list_sheets
Lists all sheet names within a spreadsheet.
9. create_sheet
Adds a new sheet (tab) to a spreadsheet.
10. get_multiple_sheet_data
Fetches data from multiple ranges across potentially different spreadsheets in one call.
11. get_multiple_spreadsheet_summary
Gets titles, sheet names, headers, and first few rows for multiple spreadsheets.
12. share_spreadsheet
Shares a spreadsheet with specified users/emails and roles.
13. add_columns
Adds columns to a sheet.
14. copy_sheet
Duplicates a sheet within a spreadsheet.
15. rename_sheet
Renames an existing sheet.
