diff --git a/src/strands/event_loop/streaming.py b/src/strands/event_loop/streaming.py
index 0a1161135..f5e0e8b02 100644
--- a/src/strands/event_loop/streaming.py
+++ b/src/strands/event_loop/streaming.py
@@ -279,6 +279,11 @@ def handle_content_block_stop(state: dict[str, Any]) -> dict[str, Any]:
         try:
             current_tool_use["input"] = json.loads(current_tool_use["input"])
         except ValueError:
+            logger.warning(
+                "Failed to parse tool input JSON for '%s': %s",
+                current_tool_use.get("name", "unknown"),
+                current_tool_use["input"][:200] if isinstance(current_tool_use.get("input"), str) else "",
+            )
             current_tool_use["input"] = {}
 
         tool_use_id = current_tool_use["toolUseId"]
diff --git a/tests/strands/event_loop/test_streaming.py b/tests/strands/event_loop/test_streaming.py
index 93f8d95f8..ba693485d 100644
--- a/tests/strands/event_loop/test_streaming.py
+++ b/tests/strands/event_loop/test_streaming.py
@@ -366,6 +366,25 @@ def test_handle_content_block_delta(event: ContentBlockDeltaEvent, event_type, s
                 "redactedContent": b"",
             },
         ),
+        # Tool Use - Malformed input JSON
+        (
+            {
+                "content": [],
+                "current_tool_use": {"toolUseId": "123", "name": "test", "input": "{invalid json}"},
+                "text": "",
+                "reasoningText": "",
+                "citationsContent": [],
+                "redactedContent": b"",
+            },
+            {
+                "content": [{"toolUse": {"toolUseId": "123", "name": "test", "input": {}}}],
+                "current_tool_use": {},
+                "text": "",
+                "reasoningText": "",
+                "citationsContent": [],
+                "redactedContent": b"",
+            },
+        ),
         # Text
         (
             {