[WIP] Refactor everything server to be more modular and use recommended APIs.

* Updated architecture.md

* Refactor / renamed all addXPrompt, addXTool, and addXResource functions to registerX...

* Added the add tool

src/everything/tools/add.ts

@@ -0,0 +1,30 @@
+import { z } from "zod";
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { CallToolResult } from "@modelcontextprotocol/sdk/types.js";
+
+const AddSchema = z.object({
+  a: z.number().describe("First number"),
+  b: z.number().describe("Second number"),
+});
+
+const name = "add";
+const config = {
+  title: "Add Tool",
+  description: "Adds two numbers",
+  inputSchema: AddSchema,
+};
+
+export const registerAddTool = (server: McpServer) => {
+  server.registerTool(name, config, async (args): Promise<CallToolResult> => {
+    const validatedArgs = AddSchema.parse(args);
+    const sum = validatedArgs.a + validatedArgs.b;
+    return {
+      content: [
+        {
+          type: "text",
+          text: `The sum of ${validatedArgs.a} and ${validatedArgs.b} is ${sum}.`,
+        },
+      ],
+    };
+  });
+};

src/everything/tools/echo.ts

@@ -13,7 +13,7 @@ const config = {
   inputSchema: EchoSchema,
 };
 
-export const addToolEcho = (server: McpServer) => {
+export const registerEchoTool = (server: McpServer) => {
   server.registerTool(name, config, async (args): Promise<CallToolResult> => {
     const validatedArgs = EchoSchema.parse(args);
     return {

src/everything/tools/index.ts

@@ -1,10 +1,12 @@
 import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
-import { addToolEcho } from "./echo.js";
+import { registerEchoTool } from "./echo.js";
+import { registerAddTool } from "./add.js";
 
 /**
  * Register the tools with the MCP server.
  * @param server
  */
 export const registerTools = (server: McpServer) => {
-  addToolEcho(server);
+  registerEchoTool(server);
+  registerAddTool(server);
 };