diff --git a/src/smolagents/default_tools.py b/src/smolagents/default_tools.py
index 8b6f44f..5628930 100644
--- a/src/smolagents/default_tools.py
+++ b/src/smolagents/default_tools.py
@@ -146,12 +146,11 @@ class UserInputTool(Tool):
 
 class DuckDuckGoSearchTool(Tool):
     name = "web_search"
-    description = """Performs a duckduckgo web search based on your query (think a Google search) then returns the top search results as a list of dict elements.
-    Each result has keys 'title', 'href' and 'body'."""
+    description = """Performs a duckduckgo web search based on your query (think a Google search) then returns the top search results."""
     inputs = {
         "query": {"type": "string", "description": "The search query to perform."}
     }
-    output_type = "any"
+    output_type = "string"
 
     def __init__(self, *args, max_results=10, **kwargs):
         super().__init__(*args, **kwargs)
diff --git a/src/smolagents/gradio_ui.py b/src/smolagents/gradio_ui.py
index b7a8724..a326d7c 100644
--- a/src/smolagents/gradio_ui.py
+++ b/src/smolagents/gradio_ui.py
@@ -35,9 +35,7 @@ def pull_messages_from_step(step_log: AgentStep, test_mode: bool = True):
                 content=str(content),
             )
         if step_log.observations is not None:
-            yield gr.ChatMessage(
-                role="assistant", content=step_log.observations
-            )
+            yield gr.ChatMessage(role="assistant", content=step_log.observations)
         if step_log.error is not None:
             yield gr.ChatMessage(
                 role="assistant",