diff --git a/scripts/dump_umma_desc.py b/scripts/dump_umma_desc.py
new file mode 100644
index 00000000..6f83e78f
--- /dev/null
+++ b/scripts/dump_umma_desc.py
@@ -0,0 +1,82 @@
+"""
+Test script to dump UMMA descriptors from the CuTeDSL FMHA.
+Uses the existing FMHA kernel with a patch to print descriptors.
+"""
+import torch
+import sys
+sys.path.insert(0, '.')
+
+from dsv4.kernels.attention.fmha import FmhaKernel
+import cute
+
+# Construct the FMHA kernel
+kernel = FmhaKernel(head_dim=64, use_smem_p=False, normalize=True)
+
+# Get the SMEM layouts
+q_layout = kernel.q_smem_layout_staged
+k_layout = kernel.k_smem_layout_staged
+v_layout = kernel.v_smem_layout_staged
+
+print(f"Q layout: {q_layout}")
+print(f"K layout: {k_layout}")
+print(f"V layout: {v_layout}")
+
+# Get the SMEM sizes
+print(f"Q SMEM: {kernel.q_smem_size} bytes")
+print(f"K SMEM: {kernel.k_smem_size} bytes")
+print(f"V SMEM: {kernel.v_smem_size} bytes")
+print(f"Total SMEM: {kernel.smem_size} bytes")
+
+# Try to construct UMMA descriptors
+try:
+    from cute.arch.mma_sm100_umma import make_umma_desc
+    from cutlass.utils.blackwell_helpers import OperandMajorMode
+
+    # Create dummy SMEM tensors
+    q_ptr = cute.make_smem_ptr(cutlass.BFloat16, 0)
+    q_tensor = cute.make_tensor(q_ptr, q_layout)
+    k_tensor = cute.make_tensor(cute.make_smem_ptr(cutlass.BFloat16, kernel.q_smem_size), k_layout)
+
+    desc_q = make_umma_desc(OperandMajorMode.MN_MAJOR, q_tensor)
+    desc_k = make_umma_desc(OperandMajorMode.K_MAJOR, k_tensor)
+
+    print(f"\ndesc_q = 0x{desc_q:016x}")
+    print(f"desc_k = 0x{desc_k:016x}")
+
+    # Decode descriptors
+    sa_q = desc_q & 0x3FFF
+    lbo_q = (desc_q >> 16) & 0x3FFF
+    sbo_q = (desc_q >> 32) & 0x3FFF
+    ver_q = (desc_q >> 46) & 0x3
+    lt_q = (desc_q >> 61) & 0x7
+    print(f"Q: start_addr={sa_q} LBO={lbo_q} SBO={sbo_q} ver={ver_q} layout={lt_q}")
+
+    sa_k = desc_k & 0x3FFF
+    lbo_k = (desc_k >> 16) & 0x3FFF
+    sbo_k = (desc_k >> 32) & 0x3FFF
+    ver_k = (desc_k >> 46) & 0x3
+    lt_k = (desc_k >> 61) & 0x7
+    print(f"K: start_addr={sa_k} LBO={lbo_k} SBO={sbo_k} ver={ver_k} layout={lt_k}")
+except Exception as e:
+    print(f"\nCouldn't construct descriptors: {e}")
+    import traceback
+    traceback.print_exc()
+
+    # Try to print layout strides instead
+    print("\nQ layout strides:")
+    try:
+        for m in [0, 1, 2, 3, 7, 8, 127]:
+            for n in [0, 1, 2, 3, 7, 8, 15, 31, 63]:
+                offset = q_layout(m, n)
+                print(f"  ({m},{n}) -> {offset}")
+    except Exception as e2:
+        print(f"  Error: {e2}")
+
+    print("\nK layout strides:")
+    try:
+        for m in [0, 1, 2, 3, 7, 8, 127]:
+            for n in [0, 1, 2, 3, 7, 8, 15, 31, 63]:
+                offset = k_layout(m, n)
+                print(f"  ({m},{n}) -> {offset}")
+    except Exception as e2:
+        print(f"  Error: {e2}")