Improve all readmes (#188)

* Improve all readmes

* Address some of the comments

weather-server-ruby/README.md

@@ -1,6 +1,31 @@
 # A Simple MCP Weather Server written in Ruby
 
-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
+
+- Ruby 3.4+ (3.3 also satisfies the gems)
+- Bundler
+
+## Setup and run
+
+```bash
+bundle install
+bundle exec ruby weather.rb
+```
+
+The server communicates over stdio, so running it directly just waits for a client on stdin. To see it in action, launch it from the Ruby client example in this repository:
+
+```bash
+cd ../mcp-client-ruby
+bundle install
+bundle exec ruby client.rb ../weather-server-ruby/weather.rb
+```
 
 ## Structured content