Improve all readmes (#188)

* Improve all readmes

* Address some of the comments

weather-server-rust/README.md

@@ -1,6 +1,35 @@
 # A Simple MCP Weather Server written in Rust
 
-See the [Build an MCP server](https://modelcontextprotocol.io/docs/develop/build-server) tutorial for more information.
+A minimal MCP server that exposes US weather data from the [National Weather Service API](https://www.weather.gov/documentation/services-web-api) as two tools:
+
+- `get_forecast` – get the forecast for a location (takes `latitude` and `longitude`)
+- `get_alerts` – get active weather alerts for a US state (takes a two-letter state code)
+
+This example accompanies the [Build an MCP server](https://modelcontextprotocol.io/docs/develop/build-server) tutorial.
+
+## Prerequisites
+
+- Rust (stable) and Cargo
+
+## Build and run
+
+```bash
+cargo build --release
+./target/release/weather
+```
+
+Or, during development:
+
+```bash
+cargo run
+```
+
+The server communicates over stdio, so running it directly just waits for a client on stdin. To see it in action, launch it from one of the client examples in this repository, for example:
+
+```bash
+cd ../mcp-client-rust
+cargo run -- ../weather-server-rust/target/release/weather
+```
 
 ## Structured content