diff --git a/ortools/java/com/google/ortools/sat/CpModel.java b/ortools/java/com/google/ortools/sat/CpModel.java
index f6ee4440c9..329b1bd3d9 100644
--- a/ortools/java/com/google/ortools/sat/CpModel.java
+++ b/ortools/java/com/google/ortools/sat/CpModel.java
@@ -971,19 +971,19 @@ public final class CpModel {
     modelBuilder.clearSolutionHint();
   }
 
-  /** Adds variable as assumption */
+  /** Adds a literal to the model as assumption */
   public void addAssumption(Literal lit) {
     modelBuilder.addAssumptions(lit.getIndex());
   }
 
-  /** Adds multiple variables to the assumptions */
+  /** Adds multiple literals to the model as assumptions */
   public void addAssumptions(Literal[] literals) {
     for (Literal lit : literals) {
       addAssumption(lit);
     }
   }
 
-  /** Remove all solution hints */
+  /** Remove all assumptions from the model */
   public void clearAssumptions() {
     modelBuilder.clearAssumptions();
   }
diff --git a/ortools/sat/cp_model.h b/ortools/sat/cp_model.h
index 5c9ab8e51d..e64770d8dd 100644
--- a/ortools/sat/cp_model.h
+++ b/ortools/sat/cp_model.h
@@ -862,13 +862,13 @@ class CpModelBuilder {
   /// Remove all hints.
   void ClearHints();
 
-  /// Adds a variable to the assumptions.
+  /// Adds a literal to the model as assumptions.
   void AddAssumption(BoolVar lit);
 
-  /// Adds multiple variables to the assumptions.
+  /// Adds multiple literals to the model as assumptions.
   void AddAssumptions(absl::Span<const BoolVar> literals);
 
-  /// Remove all assumptions.
+  /// Remove all assumptions from the model.
   void ClearAssumptions();
 
   // TODO(user) : add MapDomain?
diff --git a/ortools/sat/python/cp_model.py b/ortools/sat/python/cp_model.py
index 66bdd889dd..3821bd85c9 100644
--- a/ortools/sat/python/cp_model.py
+++ b/ortools/sat/python/cp_model.py
@@ -1547,13 +1547,16 @@ class CpModel(object):
         self.__model.ClearField("solution_hint")
 
     def AddAssumption(self, lit):
+        """Add the literal 'lit' to the model as assumptions."""
         self.__model.assumptions.append(self.GetOrMakeBooleanIndex(lit))
 
     def AddAssumptions(self, literals):
+        """Add the literals to the model as assumptions."""
         for lit in literals:
             self.AddAssumption(lit)
 
     def ClearAssumptions(self):
+        """Remove all assumptions from the model."""
         self.__model.ClearField("assumptions")