diff --git a/src/EFCore.Cosmos/Query/Internal/InExpression.cs b/src/EFCore.Cosmos/Query/Internal/InExpression.cs
index 6912c28b612..8808a75ae1a 100644
--- a/src/EFCore.Cosmos/Query/Internal/InExpression.cs
+++ b/src/EFCore.Cosmos/Query/Internal/InExpression.cs
@@ -26,7 +26,7 @@ public InExpression(
             SqlExpression item,
             bool negated,
             SqlExpression values,
-            CoreTypeMapping? typeMapping)
+            CoreTypeMapping typeMapping)
             : base(typeof(bool), typeMapping)
         {
             Item = item;
diff --git a/src/EFCore.Relational/Query/SqlExpressions/InExpression.cs b/src/EFCore.Relational/Query/SqlExpressions/InExpression.cs
index c864161fde4..1be63a46b80 100644
--- a/src/EFCore.Relational/Query/SqlExpressions/InExpression.cs
+++ b/src/EFCore.Relational/Query/SqlExpressions/InExpression.cs
@@ -66,7 +66,7 @@ public InExpression(
             SqlExpression item,
             SelectExpression subquery,
             bool negated,
-            RelationalTypeMapping? typeMapping)
+            RelationalTypeMapping typeMapping)
             : this(Check.NotNull(item, nameof(item)), null, Check.NotNull(subquery, nameof(subquery)), negated, typeMapping)
         {
         }
@@ -82,7 +82,7 @@ public InExpression(
             SqlExpression item,
             SqlExpression values,
             bool negated,
-            RelationalTypeMapping? typeMapping)
+            RelationalTypeMapping typeMapping)
             : this(Check.NotNull(item, nameof(item)), Check.NotNull(values, nameof(values)), null, negated, typeMapping)
         {
         }
diff --git a/src/EFCore/ModelConfigurationBuilder.cs b/src/EFCore/ModelConfigurationBuilder.cs
index 80ea23bba34..91000a8c312 100644
--- a/src/EFCore/ModelConfigurationBuilder.cs
+++ b/src/EFCore/ModelConfigurationBuilder.cs
@@ -74,7 +74,12 @@ public virtual ModelConfigurationBuilder IgnoreAny(Type type)
         }
 
         /// <summary>
-        ///     Marks the given and derived types as corresponding to entity type properties.
+        ///     <para>
+        ///         Marks the given and derived types as corresponding to entity type properties.
+        ///     </para>
+        ///     <para>
+        ///         This can also be called on an interface to apply the configuration to all properties of implementing types.
+        ///     </para>
         /// </summary>
         /// <typeparam name="TProperty"> The property type to be configured. </typeparam>
         /// <returns> An object that can be used to configure the properties. </returns>
@@ -86,7 +91,12 @@ public virtual PropertiesConfigurationBuilder<TProperty> Properties<TProperty>()
         }
 
         /// <summary>
-        ///     Marks the given and derived types as corresponding to entity type properties.
+        ///     <para>
+        ///         Marks the given and derived types as corresponding to entity type properties.
+        ///     </para>
+        ///     <para>
+        ///         This can also be called on an interface to apply the configuration to all properties of implementing types.
+        ///     </para>
         /// </summary>
         /// <typeparam name="TProperty"> The property type to be configured. </typeparam>
         /// <param name="buildAction"> An action that performs configuration of the property. </param>
@@ -105,7 +115,13 @@ public virtual ModelConfigurationBuilder Properties<TProperty>(
         }
 
         /// <summary>
-        ///     Marks the given and derived types as corresponding to entity type properties.
+        ///     <para>
+        ///         Marks the given and derived types as corresponding to entity type properties.
+        ///     </para>
+        ///     <para>
+        ///         This can also be called on an interface or an unbound generic type to apply the configuration to all
+        ///         properties of implementing and constructed types.
+        ///     </para>
         /// </summary>
         /// <param name="propertyType"> The property type to be configured. </param>
         /// <returns> An object that can be used to configure the property. </returns>
@@ -119,7 +135,13 @@ public virtual PropertiesConfigurationBuilder Properties(Type propertyType)
         }
 
         /// <summary>
-        ///     Marks the given and derived types as corresponding to entity type properties.
+        ///     <para>
+        ///         Marks the given and derived types as corresponding to entity type properties.
+        ///     </para>
+        ///     <para>
+        ///         This can also be called on an interface or an unbound generic type to apply the configuration to all
+        ///         properties of implementing and constructed types.
+        ///     </para>
         /// </summary>
         /// <param name="propertyType"> The property type to be configured. </param>
         /// <param name="buildAction"> An action that performs configuration of the property. </param>
@@ -140,7 +162,18 @@ public virtual ModelConfigurationBuilder Properties(
         }
 
         /// <summary>
-        ///     Marks the given type as a scalar, even when used outside of entity types.
+        ///     <para>
+        ///         Marks the given type as a scalar, even when used outside of entity types. This allows values of this type
+        ///         to be used in queries that are not referencing property of this type.
+        ///     </para>
+        ///     <para>
+        ///         Unlike <see cref="Properties{TProperty}()"/> this method should only be called on a non-nullable concrete type.
+        ///         Calling it on a base type will not apply the configuration to the derived types.
+        ///     </para>
+        ///     <para>
+        ///         Calling this is rarely needed. If there are properties of the given type calling <see cref="Properties{TProperty}()"/>
+        ///         should be enough in most cases.
+        ///     </para>
         /// </summary>
         /// <typeparam name="TScalar"> The scalar type to be configured. </typeparam>
         /// <returns> An object that can be used to configure the scalars. </returns>
@@ -152,7 +185,18 @@ public virtual ScalarConfigurationBuilder<TScalar> Scalars<TScalar>()
         }
 
         /// <summary>
-        ///     Marks the given type as a scalar, even when used outside of entity types.
+        ///     <para>
+        ///         Marks the given type as a scalar, even when used outside of entity types. This allows values of this type
+        ///         to be used in queries that are not referencing property of this type.
+        ///     </para>
+        ///     <para>
+        ///         Unlike <see cref="Properties{TProperty}()"/> this method should only be called on a non-nullable concrete type.
+        ///         Calling it on a base type will not apply the configuration to the derived types.
+        ///     </para>
+        ///     <para>
+        ///         Calling this is rarely needed. If there are properties of the given type calling <see cref="Properties{TProperty}()"/>
+        ///         should be enough in most cases.
+        ///     </para>
         /// </summary>
         /// <typeparam name="TScalar"> The scalar type to be configured. </typeparam>
         /// <param name="buildAction"> An action that performs configuration for the scalars. </param>
@@ -171,7 +215,18 @@ public virtual ModelConfigurationBuilder Scalars<TScalar>(
         }
 
         /// <summary>
-        ///     Marks the given type as a scalar, even when used outside of entity types.
+        ///     <para>
+        ///         Marks the given type as a scalar, even when used outside of entity types. This allows values of this type
+        ///         to be used in queries that are not referencing property of this type.
+        ///     </para>
+        ///     <para>
+        ///         Unlike <see cref="Properties(Type)"/> this method should only be called on a non-nullable concrete type.
+        ///         Calling it on a base type will not apply the configuration to the derived types.
+        ///     </para>
+        ///     <para>
+        ///         Calling this is rarely needed. If there are properties of the given type calling <see cref="Properties(Type)"/>
+        ///         should be enough in most cases.
+        ///     </para>
         /// </summary>
         /// <param name="scalarType"> The scalar type to be configured. </param>
         /// <returns> An object that can be used to configure the scalars. </returns>
@@ -185,7 +240,18 @@ public virtual ScalarConfigurationBuilder Scalars(Type scalarType)
         }
 
         /// <summary>
-        ///     Marks the given type as a scalar, even when used outside of entity types.
+        ///     <para>
+        ///         Marks the given type as a scalar, even when used outside of entity types. This allows values of this type
+        ///         to be used in queries that are not referencing property of this type.
+        ///     </para>
+        ///     <para>
+        ///         Unlike <see cref="Properties(Type)"/> this method should only be called on a non-nullable concrete type.
+        ///         Calling it on a base type will not apply the configuration to the derived types.
+        ///     </para>
+        ///     <para>
+        ///         Calling this is rarely needed. If there are properties of the given type calling <see cref="Properties(Type)"/>
+        ///         should be enough in most cases.
+        ///     </para>
         /// </summary>
         /// <param name="scalarType"> The scalar type to be configured. </param>
         /// <param name="buildAction"> An action that performs configuration for the scalars. </param>