MCP Memento

Instructions

Implementation Reference

• src/memento/tools/memory_tools.py:198-260 (handler)

  The handle_update_memento function handles the logic for updating existing memory entries in the database.

  @handle_tool_errors("update memory")
  async def handle_update_memento(
      memory_db: SQLiteMemoryDatabase, arguments: Dict[str, Any]
  ) -> CallToolResult:
      """Handle update_memory tool call.
  
      Args:
          memory_db: Database instance for memory operations
          arguments: Tool arguments from MCP call containing:
              - memory_id: ID of memory to update (required)
              - title: New title (optional)
              - content: New content (optional)
              - summary: New summary (optional)
              - tags: New tags list (optional)
              - importance: New importance score (optional)
  
      Returns:
          CallToolResult with success message or error
      """
      # Validate input arguments
      validate_memory_input(arguments)
  
      memory_id = arguments["memory_id"]
  
      # Get existing memory
      memory = await memory_db.get_memory(memory_id, include_relationships=False)
      if not memory:
          return CallToolResult(
              content=[TextContent(type="text", text=f"Memory not found: {memory_id}")],
              isError=True,
          )
  
      # Update fields
      if "title" in arguments:
          memory.title = arguments["title"]
      if "content" in arguments:
          memory.content = arguments["content"]
      if "summary" in arguments:
          memory.summary = arguments["summary"]
      if "tags" in arguments:
          memory.tags = arguments["tags"]
      if "importance" in arguments:
          memory.importance = arguments["importance"]
  
      # Update in database
      success = await memory_db.update_memory(memory)
  
      if success:
          return CallToolResult(
              content=[
                  TextContent(
                      type="text", text=f"Memory updated successfully: {memory_id}"
                  )
              ]
          )
      else:
          return CallToolResult(
              content=[
                  TextContent(type="text", text=f"Failed to update memory: {memory_id}")
              ],
              isError=True,
          )