fix: convert tools to proper Tool subclasses with name and description attributes

app.py

@@ -154,12 +154,48 @@ with open("prompts.yaml", 'r') as stream:
         raise
 
 # Create the agent with the templates
+class CalculateMinPriceTool(Tool):
+    name = "calculate_min_price"
+    description = "Calculate the minimum price from a list of prices"
+    inputs = {'prices': {'type': 'list[float]', 'description': 'List of product prices'}}
+    output_type = "string"
+
+    def forward(self, prices: list[float]) -> str:
+        min_price = min(prices)
+        return f"The minimum price is {min_price}"
+
+class ExtractPriceFromSnippetTool(Tool):
+    name = "extract_price_from_snippet"
+    description = "Extract prices from a text snippet"
+    inputs = {'snippet': {'type': 'string', 'description': 'Text containing prices'}}
+    output_type = "list[string]"
+
+    def forward(self, snippet: str) -> list[str]:
+        price_pattern = r'\$\d+(?:,\d{3})*(?:\.\d{2})?|\d+(?:,\d{3})*(?:\.\d{2})?\s*(USD|EUR|GBP|INR|AUD|CAD)?'
+        matches = re.findall(price_pattern, snippet)
+        matches = [str(x) for x in matches]
+        return matches
+
+class GetCurrentTimeInTimezoneTool(Tool):
+    name = "get_current_time_in_timezone"
+    description = "Get the current time in a specified timezone"
+    inputs = {'timezone': {'type': 'string', 'description': 'A valid timezone (e.g., America/New_York)'}}
+    output_type = "string"
+
+    def forward(self, timezone: str) -> str:
+        try:
+            tz = pytz.timezone(timezone)
+            local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")
+            return f"The current local time in {timezone} is: {local_time}"
+        except Exception as e:
+            return f"Error fetching time for timezone '{timezone}': {str(e)}"
+
 tools = [
-    Tool(name="final_answer", description="Submit the final answer to the question", func=final_answer),
-    Tool(name="search", description="Search the web for information", func=DuckDuckGoSearchTool()),
-    Tool(name="calculate_min_price", description="Calculate the minimum price from a list of prices", func=calculate_min_price),
-    Tool(name="extract_price_from_snippet", description="Extract prices from a text snippet", func=extract_price_from_snippet),
-    Tool(name="get_current_time_in_timezone", description="Get the current time in a specified timezone", func=get_current_time_in_timezone)
+    final_answer,
+    DuckDuckGoSearchTool(),
+    CalculateMinPriceTool(),
+    ExtractPriceFromSnippetTool(),
+    GetCurrentTimeInTimezoneTool()
 ]
 
 agent = CodeAgent(