chore: add missing delegate methods

Author: TomerAberbach

openai-java-core/src/main/kotlin/com/openai/models/responses/StructuredResponseCreateParams.kt

@@ -410,6 +410,9 @@ class StructuredResponseCreateParams<T : Any>(
         /** @see ResponseCreateParams.Builder.addTool */
         fun addTool(mcp: Tool.Mcp) = apply { paramsBuilder.addTool(mcp) }
 
+        /** @see ResponseCreateParams.Builder.addMcpTool */
+        fun addMcpTool(serverLabel: String) = apply { paramsBuilder.addMcpTool(serverLabel) }
+
         /** @see ResponseCreateParams.Builder.addTool */
         fun addTool(codeInterpreter: Tool.CodeInterpreter) = apply {
             paramsBuilder.addTool(codeInterpreter)

openai-java-core/src/test/kotlin/com/openai/models/responses/StructuredResponseCreateParamsTest.kt

@@ -196,6 +196,7 @@ internal class StructuredResponseCreateParamsTest {
                 DelegationWriteTestCase("addTool", WEB_SEARCH_TOOL),
                 DelegationWriteTestCase("addTool", COMPUTER_TOOL),
                 DelegationWriteTestCase("addTool", MCP_TOOL),
+                DelegationWriteTestCase("addMcpTool", STRING),
                 DelegationWriteTestCase("addTool", CODE_INTERPRETER_TOOL),
                 DelegationWriteTestCase("addCodeInterpreterTool", CODE_INTERPRETER_CONTAINER),
                 DelegationWriteTestCase("addCodeInterpreterTool", STRING),