fix instructions

Author: kentcdodds

exercises/02.tools/01.problem.simple/src/index.ts

@@ -13,12 +13,9 @@ const server = new McpServer(
 )
 
 // 🐨 add a tool to the server with the server.tool API
-// - it should be named 'add'
-// - it should have a description explaining what it can be used to do
-// - provide an input schema object with two properties which are validated with zod (give them descriptions as well):
-//   - firstNumber: a number
-//   - secondNumber: a number
-// - it should return a standard text response with the sum of the two numbers
+// - the name should be 'add'
+// - the description should explain what it can be used to do (add one and two)
+// - the callback should return a standard text response that says "one and two equals three"
 
 async function main() {
 	const transport = new StdioServerTransport()

exercises/03.advanced-tools/03.problem.class/README.mdx

@@ -1,7 +1,7 @@
 # Class
 
 👨‍💼 Time to level up our architecture! Most real-world MCP servers are deployed
-remotely I recommend using Cloudflare's [agent](https://npm.im/agent) module
+remotely I recommend using Cloudflare's [agents](https://npm.im/agents) module
 which exposes a `McpAgent` class that makes it easy to build a remote MCP
 server.