add mcp descriptions (#2080)

plugins/wasm-go/mcp-servers/mcp-openweather/README.md

@@ -0,0 +1,23 @@
+# Weather MCP Server
+
+A weather query MCP service based on OpenWeather API, retrieving weather information for specified cities.
+
+Source code: [https://github.com/MrCare/mcp_tool](https://github.com/MrCare/mcp_tool)
+
+## Usage Guide
+   
+### Generate SSE URL
+
+On the MCP Server interface, log in to generate the URL.
+
+### Configure MCP Client
+
+On the user's MCP Client interface, add the generated SSE URL to the MCP Server list.
+
+```json
+"mcpServers": {
+    "weather": {
+      "url": "http://mcp.higress.ai/mcp-weather/{generate_key}",
+    }
+}
+```