open-presentation
Open an existing PowerPoint presentation and create a backup copy. Specify the presentation name and optional save path to ensure data preservation during editing.
Instructions
Opens an existing presentation and saves a copy to a new file for backup. Use this tool when the user requests to open a presentation that has already been created.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| output_path | No | Path where to save the presentation (optional) | |
| presentation_name | Yes | Name of the presentation to open |
Implementation Reference
- src/powerpoint/server.py:324-342 (registration)Registers the 'open-presentation' tool with MCP server, including description and input schema.
types.Tool( name="open-presentation", description="Opens an existing presentation and saves a copy to a new file for backup. Use this tool when " "the user requests to open a presentation that has already been created.", inputSchema={ "type": "object", "properties": { "presentation_name": { "type": "string", "description": "Name of the presentation to open", }, "output_path": { "type": "string", "description": "Path where to save the presentation (optional)", }, }, "required": ["presentation_name"], }, ), - src/powerpoint/server.py:372-408 (handler)Handler function that loads the specified presentation file, sanitizes the path, creates a backup as 'backup.pptx', loads it into python-pptx Presentation object, and stores it in PresentationManager for further editing.
if name == "open-presentation": presentation_name = arguments.get("presentation_name") if not presentation_name: raise ValueError("Missing presentation name") file_name = f"{presentation_name}.pptx" try: safe_file_path = sanitize_path(folder_path, file_name) except ValueError as e: raise ValueError(f"Invalid file path: {str(e)}") # attempt to load presentation try: prs = Presentation(safe_file_path) except Exception as e: raise ValueError(f"Unable to load {safe_file_path}. Error: {str(e)}") # Create a backup of the original file file_name = BACKUP_FILE_NAME try: safe_file_path = sanitize_path(folder_path, file_name) except ValueError as e: raise ValueError(f"Invalid file path: {str(e)}") # attempt to save a backup of presentation try: prs.save(safe_file_path) except Exception as e: raise ValueError(f"Unable to save {safe_file_path}. Error: {str(e)}") presentation_manager.presentations[presentation_name] = prs return [ types.TextContent( type="text", text=f"Opened presentation: {presentation_name}" ) ] - src/powerpoint/server.py:18-30 (helper)Helper function used by open-presentation to sanitize file paths and prevent directory traversal.
def sanitize_path(base_path: str, file_name: str) -> str: """ Ensure that the resulting path doesn't escape outside the base directory Returns a safe, normalized path """ joined_path = os.path.join(base_path, file_name) normalized_path = os.path.normpath(joined_path) if not normalized_path.startswith(base_path): raise ValueError(f"Invalid path. Attempted to access location outside allowed directory.") return normalized_path