Integrating Semantic Search with Weaviate as a Tool

Enhance the 'Source Verifier' agent with a custom tool that allows it to perform semantic searches over a simulated or actual Weaviate vector database. Populate Weaviate with a small set of 'verified facts' (e.g., WHO statements, scientific journal abstracts). The agent should dynamically use this tool to query the database when it encounters a claim, retrieving relevant supporting or refuting evidence. Ensure the tool's output is correctly processed by the agent.

Consider how to define the tool so the agent knows when and how to call it effectively.