diff --git a/literalai/callback/langchain_callback.py b/literalai/callback/langchain_callback.py
index 3b7269d..0b13498 100644
--- a/literalai/callback/langchain_callback.py
+++ b/literalai/callback/langchain_callback.py
@@ -1,3 +1,4 @@
+import ast
 import time
 from importlib.metadata import version
 from typing import TYPE_CHECKING, Any, Dict, List, Optional, TypedDict, Union, cast
@@ -428,6 +429,7 @@ def _on_run_update(self, run: Run) -> None:
                 provider, model, tools, llm_settings = self._build_llm_settings(
                     (run.serialized or {}), (run.extra or {}).get("invocation_params")
                 )
+                tools = ast.literal_eval(tools)
 
                 generations = (run.outputs or {}).get("generations", [])
                 generation = generations[0][0]