fix: update tool input/output types to use smolagents allowed types

app.py

@@ -157,7 +157,7 @@ with open("prompts.yaml", 'r') as stream:
 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'}}
+    inputs = {'prices': {'type': 'array', 'description': 'List of product prices (numbers)'}}
     output_type = "string"
 
     def forward(self, prices: list[float]) -> str:
@@ -168,7 +168,7 @@ 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]"
+    output_type = "array"
 
     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)?'