You are building a customer-support agent in Azure AI Foundry Agent Service. The agent answers product questions from an internal knowledge base, but users also ask about breaking news that affects your products (e.g., recent regulatory changes and current market prices) that changes daily and is not present in your indexed documents. You must add a capability so the agent can retrieve up-to-date public web information at query time while keeping your existing knowledge-base retrieval for internal content. Which tool should you add to the agent?