Office Word MCP Server

Instructions

Implementation Reference

• word_document_server/main.py:254-258 (handler)

  MCP tool handler for 'merge_table_cells'. Registered via @mcp.tool() decorator. Defines input schema via type hints and docstring. Executes by delegating to the helper function in format_tools.py.

  @mcp.tool()
  def merge_table_cells(filename: str, table_index: int, start_row: int, start_col: int, 
                      end_row: int, end_col: int):
      """Merge cells in a rectangular area of a table."""
      return format_tools.merge_table_cells(filename, table_index, start_row, start_col, end_row, end_col)

• word_document_server/tools/format_tools.py:388-445 (helper)

  Core implementation of the merge_table_cells tool. Loads the Word document using python-docx, validates inputs, performs the cell merge operation using the merge_cells helper, saves the document, and returns a status message.

  async def merge_table_cells(filename: str, table_index: int, start_row: int, start_col: int, 
                            end_row: int, end_col: int) -> str:
      """Merge cells in a rectangular area of a table.
      
      Args:
          filename: Path to the Word document
          table_index: Index of the table (0-based)
          start_row: Starting row index (0-based)
          start_col: Starting column index (0-based)
          end_row: Ending row index (0-based, inclusive)
          end_col: Ending column index (0-based, inclusive)
      """
      filename = ensure_docx_extension(filename)
      
      # Ensure numeric parameters are the correct type
      try:
          table_index = int(table_index)
          start_row = int(start_row)
          start_col = int(start_col)
          end_row = int(end_row)
          end_col = int(end_col)
      except (ValueError, TypeError):
          return "Invalid parameter: all indices must be integers"
      
      if not os.path.exists(filename):
          return f"Document {filename} does not exist"
      
      # Check if file is writeable
      is_writeable, error_message = check_file_writeable(filename)
      if not is_writeable:
          return f"Cannot modify document: {error_message}. Consider creating a copy first."
      
      try:
          doc = Document(filename)
          
          # Validate table index
          if table_index < 0 or table_index >= len(doc.tables):
              return f"Invalid table index. Document has {len(doc.tables)} tables (0-{len(doc.tables)-1})."
          
          table = doc.tables[table_index]
          
          # Validate merge parameters
          if start_row > end_row or start_col > end_col:
              return "Invalid merge range: start indices must be <= end indices"
          
          if start_row == end_row and start_col == end_col:
              return "Invalid merge range: cannot merge a single cell with itself"
          
          # Apply cell merge
          success = merge_cells(table, start_row, start_col, end_row, end_col)
          
          if success:
              doc.save(filename)
              return f"Cells merged successfully in table {table_index} from ({start_row},{start_col}) to ({end_row},{end_col})."
          else:
              return f"Failed to merge cells. Check that indices are valid."
      except Exception as e:
          return f"Failed to merge cells: {str(e)}"