tools/google_search.py

import os
from smolagents.tools import Tool
from serpapi import GoogleSearch
from dotenv import load_dotenv

class GoogleSearchTool(Tool):
    name = "google_search"
    description = "Perform a Google search and return the top 5 results as a string."
    inputs = {'query': {'type': 'string', 'description': 'The search query to perform.'}}
    output_type = "string"

    def __init__(self):
        super().__init__()
        load_dotenv()
        self.api_key = os.getenv("SERPAPI_API_KEY")
        if not self.api_key:
            raise ValueError("SerpAPI key is missing. Set 'SERPAPI_API_KEY' in environment variables.")

    def forward(self, query: str) -> str:
        params = {
            "q": query,
            "api_key": self.api_key,
            "num": 5
        }
        search = GoogleSearch(params)
        results = search.get_dict().get("organic_results", [])

        if not results:
            return f"No search results found for '{query}'."

        formatted_results = []
        for idx, result in enumerate(results):
            title = result.get("title", "No title")
            link = result.get("link", "No link")
            snippet = result.get("snippet", "No description available.")
            formatted_results.append(f"{idx+1}. {title}\n   {snippet}\n   {link}")

        return "\n\n".join(formatted_results)