diff --git a/app/tool/tool_collection.py b/app/tool/tool_collection.py
index 41c4d84..297ab6c 100644
--- a/app/tool/tool_collection.py
+++ b/app/tool/tool_collection.py
@@ -2,6 +2,7 @@
 from typing import Any, Dict, List
 
 from app.exceptions import ToolError
+from app.logger import logger
 from app.tool.base import BaseTool, ToolFailure, ToolResult
 
 
@@ -48,11 +49,23 @@ class ToolCollection:
         return self.tool_map.get(name)
 
     def add_tool(self, tool: BaseTool):
+        """Add a single tool to the collection.
+
+        If a tool with the same name already exists, it will be skipped and a warning will be logged.
+        """
+        if tool.name in self.tool_map:
+            logger.warning(f"Tool {tool.name} already exists in collection, skipping")
+            return self
+
         self.tools += (tool,)
         self.tool_map[tool.name] = tool
         return self
 
     def add_tools(self, *tools: BaseTool):
+        """Add multiple tools to the collection.
+
+        If any tool has a name conflict with an existing tool, it will be skipped and a warning will be logged.
+        """
         for tool in tools:
             self.add_tool(tool)
         return self