Create tools.py

tools.py

@@ -0,0 +1,30 @@
+from tool_registry import tool
+import urllib.request
+import json
+
+@tool()
+def convert_currency(amount: float, from_currency: str, to_currency: str) -> str:
+    """Converts currency using latest exchange rates.
+    
+    Parameters:
+        - amount: Amount to convert
+        - from_currency: Source currency code (e.g., USD)
+        - to_currency: Target currency code (e.g., EUR)
+    """
+    try:
+        url = f"https://open.er-api.com/v6/latest/{from_currency.upper()}"
+        with urllib.request.urlopen(url) as response:
+            data = json.loads(response.read())
+            
+        if "rates" not in data:
+            return "Error: Could not fetch exchange rates"
+            
+        rate = data["rates"].get(to_currency.upper())
+        if not rate:
+            return f"Error: No rate found for {to_currency}"
+            
+        converted = amount * rate
+        return f"{amount} {from_currency.upper()} = {converted:.2f} {to_currency.upper()}"
+        
+    except Exception as e:
+        return f"Error converting currency: {str(e)}"