diff --git a/tools.py b/tools.py
deleted file mode 100644
index 7289501..0000000
--- a/tools.py
+++ /dev/null
@@ -1,42 +0,0 @@
-import os
-from typing import Any
-
-from langchain.tools import tool
-from langchain_tavily import TavilySearch
-
-from vectorstore import create_vectorstore
-
-
-def _format_local_docs(results: list[Any]) -> str:
-    if not results:
-        return "Source: qdrant\nNo relevant local documents found."
-
-    parts = ["Source: qdrant"]
-    for index, doc in enumerate(results, start=1):
-        source = doc.metadata.get("source", "unknown")
-        parts.append(f"{index}. ({source}) {doc.page_content}")
-    return "\n".join(parts)
-
-
-@tool
-def search_local_kb(query: str, top_k: int = 3) -> str:
-    """Search the local ChromaDB knowledge base for internal course notes and local documents."""
-    vectorstore = create_vectorstore()
-    retriever = vectorstore.as_retriever(search_kwargs={"k": top_k})
-    results = retriever.invoke(query)
-    return _format_local_docs(results)
-
-
-@tool
-def web_search(query: str) -> str:
-    """Search the web with Tavily for fresh facts, current news, or anything not covered by local documents."""
-    api_key = os.getenv("TAVILY_API_KEY")
-    if not api_key:
-        return "Source: tavily\nTAVILY_API_KEY is not set, so web search is unavailable."
-
-    search_tool = TavilySearch(
-        max_results=5,
-        topic="general",
-    )
-    result = search_tool.invoke({"query": query})
-    return f"Source: tavily\n{result}"