diff --git a/src/Core/Services/OpenAPI/OpenApiDocumentor.cs b/src/Core/Services/OpenAPI/OpenApiDocumentor.cs
index e66968de13..0b090f4335 100644
--- a/src/Core/Services/OpenAPI/OpenApiDocumentor.cs
+++ b/src/Core/Services/OpenAPI/OpenApiDocumentor.cs
@@ -680,7 +680,7 @@ private static void AddCustomHeadersToOperation(OpenApiOperation operation)
 
         /// <summary>
         /// This method adds the input parameters from the stored procedure definition to the OpenApi operation parameters.
-        /// A input parameter will be marked REQUIRED if default value is not available.
+        /// A input parameter will be marked REQUIRED when it is explicitly flagged in config or when no default value is available.
         /// </summary>
         private static void AddStoredProcedureInputParameters(OpenApiOperation operation, StoredProcedureDefinition spDefinition)
         {
@@ -690,7 +690,7 @@ private static void AddStoredProcedureInputParameters(OpenApiOperation operation
                     GetOpenApiQueryParameter(
                         name: paramKey,
                         description: "Input parameter for stored procedure arguments",
-                        required: false,
+                        required: parameterDefinition.Required ?? !parameterDefinition.HasConfigDefault,
                         type: TypeHelper.GetJsonDataTypeFromSystemType(parameterDefinition.SystemType).ToString().ToLower()
                     )
                 );
@@ -1135,9 +1135,9 @@ private static bool IsRequestBodyRequired(SourceDefinition sourceDef, bool consi
                 StoredProcedureDefinition spDef = (StoredProcedureDefinition)sourceDef;
                 foreach (KeyValuePair<string, ParameterDefinition> parameterMetadata in spDef.Parameters)
                 {
-                    // A parameter which does not have any of the following properties
+                    // A parameter which is explicitly marked required or has no default value
                     // results in the body being required so that a value can be provided.
-                    if (!parameterMetadata.Value.HasConfigDefault)
+                    if (parameterMetadata.Value.Required ?? !parameterMetadata.Value.HasConfigDefault)
                     {
                         requestBodyRequired = true;
                         break;
@@ -1422,7 +1422,10 @@ private static OpenApiSchema CreateSpRequestComponentSchema(Dictionary<string, P
                     Default = def.Default is not null ? new OpenApiString(def.Default) : null
                 });
 
-                if (def.Required == true)
+                // A parameter is required when it is explicitly marked required in the runtime config,
+                // or when no default value is available, in which case a value must be provided in the
+                // request body. This mirrors the logic used by IsRequestBodyRequired.
+                if (def.Required ?? !def.HasConfigDefault)
                 {
                     required.Add(parameter);
                 }
diff --git a/src/Service.Tests/OpenApiDocumentor/StoredProcedureGeneration.cs b/src/Service.Tests/OpenApiDocumentor/StoredProcedureGeneration.cs
index c22ddddc2c..714829ef23 100644
--- a/src/Service.Tests/OpenApiDocumentor/StoredProcedureGeneration.cs
+++ b/src/Service.Tests/OpenApiDocumentor/StoredProcedureGeneration.cs
@@ -63,9 +63,72 @@ public static void CreateEntities()
                 Relationships: null,
                 Description: "Represents a stored procedure for books");
 
+            // Entity whose "title" parameter has a config-provided default value.
+            // Because a default is available, "title" must not be flagged as required, while
+            // "publisher_id" (no default) must remain required.
+            Entity entity2 = new(
+                Source: new(
+                    Object: "insert_book",
+                    EntitySourceType.StoredProcedure,
+                    Parameters: new List<ParameterMetadata>
+                    {
+                        new() { Name = "title", Default = "Sample Title" }
+                    },
+                    KeyFields: null),
+                Fields: null,
+                GraphQL: new(Singular: null, Plural: null, Enabled: false),
+                Rest: new(Methods: EntityRestOptions.DEFAULT_SUPPORTED_VERBS),
+                Permissions: OpenApiTestBootstrap.CreateBasicPermissions(),
+                Mappings: null,
+                Relationships: null,
+                Description: "Stored procedure with a parameter default");
+
+            // Entity whose "title" parameter is explicitly marked required: false in config.
+            // Even though it has no default value, the explicit override must be honored so that only
+            // "id" (no default, no override) remains required.
+            Entity entity3 = new(
+                Source: new(
+                    Object: "update_book_title",
+                    EntitySourceType.StoredProcedure,
+                    Parameters: new List<ParameterMetadata>
+                    {
+                        new() { Name = "title", Required = false }
+                    },
+                    KeyFields: null),
+                Fields: null,
+                GraphQL: new(Singular: null, Plural: null, Enabled: false),
+                Rest: new(Methods: EntityRestOptions.DEFAULT_SUPPORTED_VERBS),
+                Permissions: OpenApiTestBootstrap.CreateBasicPermissions(),
+                Mappings: null,
+                Relationships: null,
+                Description: "Stored procedure with an explicit required override");
+
+            // Entity whose only parameter is explicitly marked required: false in config.
+            // Because no parameter is required, requestBody.Required and the GET query parameter's
+            // required flag must both be false, and the schema-level required set must be empty.
+            Entity entity4 = new(
+                Source: new(
+                    Object: "get_publisher_by_id",
+                    EntitySourceType.StoredProcedure,
+                    Parameters: new List<ParameterMetadata>
+                    {
+                        new() { Name = "id", Required = false }
+                    },
+                    KeyFields: null),
+                Fields: null,
+                GraphQL: new(Singular: null, Plural: null, Enabled: false),
+                Rest: new(Methods: EntityRestOptions.DEFAULT_SUPPORTED_VERBS),
+                Permissions: OpenApiTestBootstrap.CreateBasicPermissions(),
+                Mappings: null,
+                Relationships: null,
+                Description: "Stored procedure with all parameters marked required: false");
+
             Dictionary<string, Entity> entities = new()
             {
-                { "sp1", entity1 }
+                { "sp1", entity1 },
+                { "sp2", entity2 },
+                { "sp3", entity3 },
+                { "sp4", entity4 }
             };
 
             _runtimeEntities = new(entities);
@@ -74,13 +137,23 @@ public static void CreateEntities()
         /// <summary>
         /// Validates that the generated request body references stored procedure parameters
         /// and not result set columns.
+        /// Also validates that the request body schema component flags the expected parameters
+        /// as required: a parameter is required when it has no default value and is not explicitly
+        /// marked required: false in the runtime config.
+        /// Also validates the body-level required flag on the OpenApiRequestBody object, which
+        /// should be true when any parameter is required and false when all parameters are optional.
         /// </summary>
         /// <param name="entityName">Entity name</param>
         /// <param name="expectedParameters">Expected parameters in request body</param>
         /// <param name="expectedParametersJsonTypes">Expected parameter value types in request body.</param>
-        [DataRow("sp1", new string[] { "title", "publisher_name" }, new string[] { "string", "string" }, DisplayName = "Validate request body parameters and parameter Json data types.")]
+        /// <param name="expectedRequiredParameters">Expected parameters flagged as required in the schema component.</param>
+        /// <param name="expectedRequestBodyRequired">Expected value of the body-level required flag.</param>
+        [DataRow("sp1", new string[] { "title", "publisher_name" }, new string[] { "string", "string" }, new string[] { "title", "publisher_name" }, true, DisplayName = "Parameters without defaults are all required.")]
+        [DataRow("sp2", new string[] { "title", "publisher_id" }, new string[] { "string", "integer" }, new string[] { "publisher_id" }, true, DisplayName = "Parameter with a config default is not required.")]
+        [DataRow("sp3", new string[] { "id", "title" }, new string[] { "integer", "string" }, new string[] { "id" }, true, DisplayName = "Parameter explicitly marked required: false is not required.")]
+        [DataRow("sp4", new string[] { "id" }, new string[] { "integer" }, new string[] { }, false, DisplayName = "All parameters marked required: false produces empty required set and optional request body.")]
         [DataTestMethod]
-        public void ValidateRequestBodyContents(string entityName, string[] expectedParameters, string[] expectedParametersJsonTypes)
+        public void ValidateRequestBodyContents(string entityName, string[] expectedParameters, string[] expectedParametersJsonTypes, string[] expectedRequiredParameters, bool expectedRequestBodyRequired)
         {
             Dictionary<OperationType, bool> configuredOperations = ResolveConfiguredOperations(_runtimeEntities[entityName]);
             foreach (OperationType opType in configuredOperations.Keys)
@@ -100,7 +173,17 @@ public void ValidateRequestBodyContents(string entityName, string[] expectedPara
                 OpenApiReference schemaComponentReference = GetRequestBodyReference(requestBody);
                 string expectedSchemaReferenceId = $"{entityName}{OpenApiDocumentor.SP_REQUEST_SUFFIX}";
 
+                // Validate the body-level required flag.
+                Assert.AreEqual(expectedRequestBodyRequired, requestBody.Required, message: "Unexpected request body required value.");
+
                 ValidateOpenApiReferenceContents(schemaComponentReference, expectedSchemaReferenceId, expectedParameters, expectedParametersJsonTypes);
+
+                // Validate that the expected parameters are marked as required in the schema component.
+                ISet<string> requiredParameters = _openApiDocument.Components.Schemas[expectedSchemaReferenceId].Required ?? new HashSet<string>();
+                CollectionAssert.AreEquivalent(
+                    expectedRequiredParameters,
+                    requiredParameters.ToArray(),
+                    message: "Unexpected required parameters in request body schema component.");
             }
         }
 
@@ -149,6 +232,37 @@ public void OpenApiDocumentor_TagsIncludeEntityDescription()
                 $"Expected tag for '{entityName}' with description '{expectedDescription}' not found.");
         }
 
+        /// <summary>
+        /// Validates that the generated GET operation query parameters for stored procedure entities
+        /// have the correct required flag: a parameter without a config default and not explicitly
+        /// marked required: false is required; a parameter explicitly marked required: false is not.
+        /// </summary>
+        /// <param name="entityName">Entity name.</param>
+        /// <param name="expectedParameters">Expected query parameter names.</param>
+        /// <param name="expectedRequired">Whether each corresponding query parameter is expected to be required.</param>
+        [DataRow("sp1", new string[] { "title", "publisher_name" }, new bool[] { true, true }, DisplayName = "GET parameters without defaults are required.")]
+        [DataRow("sp4", new string[] { "id" }, new bool[] { false }, DisplayName = "GET parameter explicitly marked required: false is not required.")]
+        [DataTestMethod]
+        public void ValidateGetQueryParameters(string entityName, string[] expectedParameters, bool[] expectedRequired)
+        {
+            OpenApiOperation getOperation = _openApiDocument.Paths["/" + entityName].Operations[OperationType.Get];
+            Assert.IsNotNull(getOperation, "GET operation not found.");
+
+            // Filter to query parameters only (excludes the Authorization and X-MS-API-ROLE header parameters).
+            List<OpenApiParameter> spParams = getOperation.Parameters
+                .Where(p => p.In == ParameterLocation.Query)
+                .ToList();
+
+            Assert.AreEqual(expectedParameters.Length, spParams.Count, "Unexpected number of GET query parameters.");
+
+            for (int i = 0; i < expectedParameters.Length; i++)
+            {
+                OpenApiParameter param = spParams.FirstOrDefault(p => p.Name == expectedParameters[i]);
+                Assert.IsNotNull(param, $"Parameter '{expectedParameters[i]}' not found in GET query parameters.");
+                Assert.AreEqual(expectedRequired[i], param.Required, $"Unexpected required value for GET query parameter '{expectedParameters[i]}'.");
+            }
+        }
+
         /// <summary>
         /// Validates that the provided OpenApiReference object has the expected schema reference id
         /// and that that id is present in the list of component schema in the OpenApi document.