diff --git a/tools.py b/tools.py
new file mode 100644
index 0000000..44fd120
--- /dev/null
+++ b/tools.py
@@ -0,0 +1,28 @@
+import os
+from langchain.tools import tool
+from langchain_text_splitters import RecursiveCharacterTextSplitter
+from langchain_core.documents import Document
+from rag_store import KnowledgeBase
+
+kb = KnowledgeBase()
+
+splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=200)
+
+@tool
+def search_knowledge_base(query: str, max_results: int = 3) -> str:
+    """Search the knowledge base for relevant information."""
+    docs = kb.similarity_search(query, k=max_results)
+    if not docs:
+        return "No results found."
+    return "\n\n".join(
+        f"Title: {doc.metadata.get('title', 'N/A')}\nContent: {doc.page_content}"
+        for doc in docs
+    )
+
+@tool
+def add_to_knowledge_base(content: str, title: str = "Untitled") -> str:
+    """Add content to the knowledge base."""
+    chunks = splitter.split_text(content)
+    docs = [Document(page_content=chunk, metadata={"title": title}) for chunk in chunks]
+    kb.add_documents(docs)
+    return f"Added document '{title}'."
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