Obsidian Tools MCP Server

Instructions

Implementation Reference

• src/index.ts:464-476 (handler)

  The main handler function for the 'update_note' tool. It resolves the full file path, checks if the note exists, overwrites the file with the new content, and returns a success message.

  async function handleUpdateNote(args: {
    path: string;
    content: string;
  }): Promise<string> {
    const fullPath = resolvePath(args.path);
  
    if (!(await fileExists(fullPath))) {
      throw new Error(`Note not found at ${args.path}`);
    }
  
    await fs.writeFile(fullPath, args.content, "utf-8");
    return `Successfully updated note at ${args.path}`;
  }

• src/index.ts:67-80 (schema)

  Input schema definition for the 'update_note' tool, specifying required 'path' and 'content' parameters.

  inputSchema: {
    type: "object",
    properties: {
      path: {
        type: "string",
        description: "Path to the note to update relative to vault root",
      },
      content: {
        type: "string",
        description: "New content for the note",
      },
    },
    required: ["path", "content"],
  },

• src/index.ts:64-81 (registration)

  Registration of the 'update_note' tool in the tools array, including name, description, and input schema. This array is returned by the ListToolsRequest handler.

  {
    name: "update_note",
    description: "Update/replace the entire content of an existing note",
    inputSchema: {
      type: "object",
      properties: {
        path: {
          type: "string",
          description: "Path to the note to update relative to vault root",
        },
        content: {
          type: "string",
          description: "New content for the note",
        },
      },
      required: ["path", "content"],
    },
  },

• src/index.ts:873-877 (registration)

  Dispatch case in the tool call handler that routes 'update_note' calls to the handleUpdateNote function.

  case "update_note":
    result = await handleUpdateNote(
      args as { path: string; content: string }
    );
    break;