xlwings Excel MCP Server

Instructions

Rename worksheet in workbook.

Args:
    session_id: Session ID from open_workbook (required)
    old_name: Current name of the worksheet
    new_name: New name for the worksheet

Implementation Reference

• src/xlwings_mcp/server.py:881-912 (registration)

  Registration and handler for the 'rename_worksheet' MCP tool. Validates session and delegates to xlwings implementation.

  @mcp.tool()
  def rename_worksheet(
      session_id: str,
      old_name: str,
      new_name: str
  ) -> str:
      """
      Rename worksheet in workbook.
      
      Args:
          session_id: Session ID from open_workbook (required)
          old_name: Current name of the worksheet
          new_name: New name for the worksheet
      """
      try:
          # Validate session using centralized helper
          session = get_validated_session(session_id)
          if isinstance(session, str):  # Error message returned
              return session
              
          with session.lock:
              from xlwings_mcp.xlwings_impl.sheet_xlw import rename_worksheet_xlw_with_wb
              result = rename_worksheet_xlw_with_wb(session.workbook, old_name, new_name)
          
          return result.get("message", "Worksheet renamed successfully") if "error" not in result else f"Error: {result['error']}"
          
      except (ValidationError, SheetError) as e:
          return f"Error: {str(e)}"
      except Exception as e:
          logger.error(f"Error renaming worksheet: {e}")
          raise

• src/xlwings_mcp/xlwings_impl/sheet_xlw.py:135-167 (handler)

  Core xlwings implementation for renaming a worksheet using an existing workbook object (session-based). Performs validation, renames sheet, and saves.

  def rename_worksheet_xlw_with_wb(wb, old_name: str, new_name: str) -> Dict[str, Any]:
      """Session-based version using existing workbook object.
      
      Args:
          wb: Workbook object from session
          old_name: 기존 시트명
          new_name: 새 시트명
          
      Returns:
          이름 변경 결과 딕셔너리
      """
      try:
          # 기존 시트 확인
          existing_sheets = [sheet.name for sheet in wb.sheets]
          if old_name not in existing_sheets:
              return {"error": f"Sheet '{old_name}' not found"}
          
          # 새 이름 중복 확인
          if new_name in existing_sheets:
              return {"error": f"Sheet '{new_name}' already exists"}
          
          # 시트 이름 변경
          wb.sheets[old_name].name = new_name
          
          # 파일 저장
          wb.save()
          
          return {"message": f"Sheet renamed from '{old_name}' to '{new_name}'"}
          
      except Exception as e:
          logger.error(f"xlwings 워크시트 이름 변경 실패: {e}")
          return {"error": f"Failed to rename worksheet: {str(e)}"}

• src/xlwings_mcp/sheet.py:34-39 (helper)

  Wrapper function in sheet.py that calls the non-session xlwings rename_worksheet_xlw implementation (legacy/non-primary path).

  def rename_sheet(filepath: str, old_name: str, new_name: str) -> Dict[str, Any]:
      """Rename a worksheet."""
      result = rename_worksheet_xlw(filepath, old_name, new_name)
      if "error" in result:
          raise SheetError(result["error"])
      return result

• src/xlwings_mcp/xlwings_impl/sheet_xlw.py:297-360 (helper)

  Non-session (filepath-based) xlwings implementation for renaming worksheet. Opens workbook, renames, saves, and cleans up Excel app.

  def rename_worksheet_xlw(filepath: str, old_name: str, new_name: str) -> Dict[str, Any]:
      """xlwings를 사용한 워크시트 이름 변경
  
      Args:
          filepath: Excel 파일 경로
          old_name: 기존 시트명
          new_name: 새 시트명
  
      Returns:
          이름 변경 결과 딕셔너리
      """
      app = None
      wb = None
  
      # Initialize COM for thread safety (Windows)
      _com_initialize()
  
      try:
          # 파일 경로 검증
          file_path = Path(filepath)
          if not file_path.exists():
              return {"error": f"File not found: {filepath}"}
          
          # Excel 앱 시작
          app = xw.App(visible=False, add_book=False)
          
          # 워크북 열기
          wb = app.books.open(filepath)
          
          # 기존 시트 확인
          existing_sheets = [sheet.name for sheet in wb.sheets]
          if old_name not in existing_sheets:
              return {"error": f"Sheet '{old_name}' not found"}
          
          # 새 이름 중복 확인
          if new_name in existing_sheets:
              return {"error": f"Sheet '{new_name}' already exists"}
          
          # 시트 이름 변경
          wb.sheets[old_name].name = new_name
          
          # 파일 저장
          wb.save()
          
          return {"message": f"Sheet renamed from '{old_name}' to '{new_name}'"}
          
      except Exception as e:
          logger.error(f"xlwings 워크시트 이름 변경 실패: {e}")
          return {"error": f"Failed to rename worksheet: {str(e)}"}
          
      finally:
          # 리소스 정리
          if wb:
              try:
                  wb.close()
              except Exception as e:
                  logger.warning(f"워크북 닫기 실패: {e}")
          
          if app:
              try:
                  app.quit()
              except Exception as e:
                  logger.warning(f"Excel 앱 종료 실패: {e}")