diff --git a/src/strands/tools/tools.py b/src/strands/tools/tools.py
index 40565a24..8be354e8 100644
--- a/src/strands/tools/tools.py
+++ b/src/strands/tools/tools.py
@@ -47,7 +47,7 @@ def validate_tool_use_name(tool: ToolUse) -> None:
         raise InvalidToolUseNameException(message)
 
     tool_name = tool["name"]
-    tool_name_pattern = r"^[a-zA-Z][a-zA-Z0-9_]*$"
+    tool_name_pattern = r"^[a-zA-Z][a-zA-Z0-9_\-]*$"
     tool_name_max_length = 64
     valid_name_pattern = bool(re.match(tool_name_pattern, tool_name))
     tool_name_len = len(tool_name)
diff --git a/tests/strands/tools/test_tools.py b/tests/strands/tools/test_tools.py
index 8a6b406f..f24cc22d 100644
--- a/tests/strands/tools/test_tools.py
+++ b/tests/strands/tools/test_tools.py
@@ -14,9 +14,13 @@
 
 
 def test_validate_tool_use_name_valid():
-    tool = {"name": "valid_tool_name", "toolUseId": "123"}
+    tool1 = {"name": "valid_tool_name", "toolUseId": "123"}
+    # Should not raise an exception
+    validate_tool_use_name(tool1)
+
+    tool2 = {"name": "valid-name", "toolUseId": "123"}
     # Should not raise an exception
-    validate_tool_use_name(tool)
+    validate_tool_use_name(tool2)
 
 
 def test_validate_tool_use_name_missing():