diff --git a/dat-was-lib/src/main/java/io/shinhanlife/dat/lib/util/ToolScaffolder.java b/dat-was-lib/src/main/java/io/shinhanlife/dat/lib/util/ToolScaffolder.java
index 517a7463..78997152 100644
--- a/dat-was-lib/src/main/java/io/shinhanlife/dat/lib/util/ToolScaffolder.java
+++ b/dat-was-lib/src/main/java/io/shinhanlife/dat/lib/util/ToolScaffolder.java
@@ -868,11 +868,13 @@ public class ToolScaffolder {
                 import %s.usecase.%sUseCase;
                 import io.shinhanlife.dat.lib.integration.mci.component.AxhubMciComponent;
                 import io.shinhanlife.glow.communication.dto.Transfer;
+                import io.shinhanlife.glow.BizException;
                 import org.springframework.stereotype.Service;
                 import lombok.RequiredArgsConstructor;
                 import lombok.extern.slf4j.Slf4j;
                 import %s.converter.%sConverter;
                 import %s.%s.io.%s_I;
+                import %s.%s.io.%s_O;
                 %s
 
                 /**
@@ -883,10 +885,10 @@ public class ToolScaffolder {
                  * @create %s
                  * <pre>
                  * ---------- 개정이력 ----------
-                 * 수정일       수정자     수정내용
+                 * 수정일      수정자    수정내용
                  * ---------- -------- ---------------------------
                  * %s  %s    최초생성
-                 * 
+                 *
                  * </pre>
                  */
                 @Slf4j
@@ -903,19 +905,33 @@ public class ToolScaffolder {
                         try {
                             // MapStruct를 이용한 자동 매핑 (AI DTO -> MCI DTO)
                             %s_I mciReq = converter.toLegacyRequest(req);
+                            Transfer<%s_O> resTransfer = null;
+
+                            if (mciReq != null) {
+                                resTransfer = mci.callTo(
+                                        "%s",
+                                        null,
+                                        mciReq,
+                                        %s_O.class
+                                );
+                            }
 
-                            Transfer<Object> resTransfer = mci.callTo(
-                                    "%s", 
-                                    null, 
-                                    mciReq, 
-                                    Object.class
-                            );
                             %sResponse response = new %sResponse();
+                            if (resTransfer != null && resTransfer.getBody() != null) {
+                                response = converter.toResponse(resTransfer.getBody());
+                            }
+
                             response.setResultCode("SUCCESS");
-                            response.setResultMessage(resTransfer.getBody() != null
+                            response.setResultMessage(resTransfer != null && resTransfer.getBody() != null
                                     ? "MCI call completed."
                                     : "MCI call completed without a response body.");
                             return response;
+                        } catch (BizException e) {
+                            log.error("[MCI Tool] 연동 중 오류 발생: {}", e.getMessage(), e);
+                            %sResponse response = new %sResponse();
+                            response.setResultCode("ERROR");
+                            response.setResultMessage(e.getMessage() != null ? e.getMessage() : "Unknown error");
+                            return response;
                         } catch (Exception e) {
                             log.error("[MCI Tool] 연동 중 오류 발생: {}", e.getMessage(), e);
                             %sResponse response = new %sResponse();
@@ -932,6 +948,7 @@ public class ToolScaffolder {
                     bizPackage, baseName,
                     bizPackage, baseName,
                     BASE_PACKAGE, mciGroupPath.replace("/", "."), ioPrefix,
+                    BASE_PACKAGE, mciGroupPath.replace("/", "."), ioPrefix,
                     (clientPrefixCap.isEmpty() ? "" : "import " + BASE_PACKAGE + "." + mciGroupPath.replace("/", ".") + ".Mci" + clientPrefixCap + "Client;\n"),
                     bizPackage,
                     baseName,
@@ -946,20 +963,16 @@ public class ToolScaffolder {
                     baseName,
                     toolName,
                     ioPrefix,
+                    ioPrefix,
                     interfaceId,
+                    ioPrefix,
+                    baseName,
+                    baseName,
                     baseName,
                     baseName,
                     baseName,
                     baseName
             );
-            String mciIoPackage = BASE_PACKAGE + "." + mciGroupPath.replace("/", ".");
-            serviceImplContent = serviceImplContent
-                    .replace("import " + mciIoPackage + ".io." + ioPrefix + "_I;",
-                            "import " + mciIoPackage + ".io." + ioPrefix + "_I;\nimport " + mciIoPackage + ".io." + ioPrefix + "_O;")
-                    .replace("Transfer<Object> resTransfer", "Transfer<" + ioPrefix + "_O> resTransfer")
-                    .replace("Object.class", ioPrefix + "_O.class")
-                    .replace("response.setResultCode(\"SUCCESS\");",
-                            "if (resTransfer.getBody() != null) {\n                response = converter.toResponse(resTransfer.getBody());\n            }\n            response.setResultCode(\"SUCCESS\");");
         } else {
             serviceImplContent = isHttp
                     ? httpUseCaseImplContent(bizPackage, baseName, httpGroupPath.replace("/", "."), httpApiClass, author, createDate)