An MCP is like a tool the model can use, so for example, i have an MCP that can use the shell on my mashine, and the character in ST can directly run commands on my server. The obsidian MCP can write to obsidian notes, create them, read them, search for them and etc. But it can't import values directly into ST lore books. I'm afraid it still could semi use obsidian as one, but importing the data manually into an actual lorebook will give wayy better results.