Refactor chat-stream-provider to simplify tool structure. Optimize WeatherTool implementation with enriched function schema.

packages/ai/src/tools/basic.ts

@@ -34,8 +34,23 @@ export const WeatherTool = {
     required: ['location'],
     additionalProperties: false,
   },
-  function: async (params: { location: string }) => {
-    console.log('[WeatherTool] Getting weather for:', params.location);
-    return { temperature: '25°C' };
+  function: {
+    name: 'getCurrentTemperature',
+    description: 'Get the current temperature for a specific location',
+    parameters: {
+      type: 'object',
+      properties: {
+        location: {
+          type: 'string',
+          description: 'The city and state, e.g., San Francisco, CA',
+        },
+        unit: {
+          type: 'string',
+          enum: ['Celsius', 'Fahrenheit'],
+          description: "The temperature unit to use. Infer this from the user's location.",
+        },
+      },
+      required: ['location', 'unit'],
+    },
   },
 };