diff --git a/torch/fx/experimental/symbolic_shapes.py b/torch/fx/experimental/symbolic_shapes.py
index 2b45e9eddb1..fa08d20e4de 100644
--- a/torch/fx/experimental/symbolic_shapes.py
+++ b/torch/fx/experimental/symbolic_shapes.py
@@ -2385,6 +2385,20 @@ def _sympy_cast_symbool_to_symint_guardless(x: SympyBoolean) -> sympy.Expr:
 def cast_symbool_to_symint_guardless(
     symbool: Union[bool, torch.SymBool]
 ) -> Union[int, torch.SymInt]:
+    """
+    Converts a SymBool or bool to a SymInt or int without introducing guards.
+
+    This function maps True to 1 and False to 0, preserving the symbolic nature
+    of the input when it's a SymBool. Unlike regular casting which might introduce
+    guards, this function performs the conversion without adding any guards.
+
+    Args:
+        symbool: A boolean value, either a concrete bool or symbolic SymBool
+
+    Returns:
+        The corresponding integer value (1 for True, 0 for False) as either
+        a concrete int or symbolic SymInt
+    """
     if isinstance(symbool, bool):
         return 1 if symbool else 0
     int_sym = _sympy_cast_symbool_to_symint_guardless(symbool.node.expr)