diff --git a/axhub-common/src/main/java/io/shinhanlife/axhub/common/util/ToolScaffolder.java b/axhub-common/src/main/java/io/shinhanlife/axhub/common/util/ToolScaffolder.java
index ce1e835..6af8d89 100644
--- a/axhub-common/src/main/java/io/shinhanlife/axhub/common/util/ToolScaffolder.java
+++ b/axhub-common/src/main/java/io/shinhanlife/axhub/common/util/ToolScaffolder.java
@@ -229,7 +229,7 @@ public class ToolScaffolder {
 
             /**
              * @package %s.%s.dto
-             * @className %sMciReqDto
+             * @className %sLegacyReq
              * @description AX HUB 시스템 처리 클래스
              * @author %s
              * @create %s
@@ -242,11 +242,11 @@ public class ToolScaffolder {
              * </pre>
              */
             @Data
-            public class %sMciReqDto {
+            public class %sLegacyReq {
                 // TODO: Add legacy request fields here
             }
             """.formatted(BASE_PACKAGE, shortName, BASE_PACKAGE, shortName, baseName, author, createDate, createDate, author, baseName);
-        Files.writeString(legacyDtoDir.resolve(baseName + "MciReqDto.java"), legacyReqContent);
+        Files.writeString(legacyDtoDir.resolve(baseName + "LegacyReq.java"), legacyReqContent);
 
         // Generate Legacy Res DTO
         String legacyResContent = """
@@ -256,7 +256,7 @@ public class ToolScaffolder {
 
             /**
              * @package %s.%s.dto
-             * @className %sMciResDto
+             * @className %sLegacyRes
              * @description AX HUB 시스템 처리 클래스
              * @author %s
              * @create %s
@@ -269,27 +269,27 @@ public class ToolScaffolder {
              * </pre>
              */
             @Data
-            public class %sMciResDto {
+            public class %sLegacyRes {
                 // TODO: Add legacy response fields here
             }
             """.formatted(BASE_PACKAGE, shortName, BASE_PACKAGE, shortName, baseName, author, createDate, createDate, author, baseName);
-        Files.writeString(legacyDtoDir.resolve(baseName + "MciResDto.java"), legacyResContent);
+        Files.writeString(legacyDtoDir.resolve(baseName + "LegacyRes.java"), legacyResContent);
 
-        // Generate MCI Converter
+        // Generate Legacy Converter
         String converterContent = """
             package %s.%s.converter;
 
             import %s.dto.%sReq;
             import %s.dto.%sRes;
-            import %s.%s.dto.%sMciReqDto;
-            import %s.%s.dto.%sMciResDto;
+            import %s.%s.dto.%sLegacyReq;
+            import %s.%s.dto.%sLegacyRes;
             import org.mapstruct.Mapper;
             import org.mapstruct.Mapping;
             import org.mapstruct.factory.Mappers;
 
             /**
              * @package %s.%s.converter
-             * @className %sMciConverter
+             * @className %sLegacyConverter
              * @description AX HUB 시스템 처리 클래스
              * @author %s
              * @create %s
@@ -302,14 +302,14 @@ public class ToolScaffolder {
              * </pre>
              */
             @Mapper(componentModel = "spring")
-            public interface %sMciConverter {
+            public interface %sLegacyConverter {
 
-                %sMciConverter INSTANCE = Mappers.getMapper(%sMciConverter.class);
+                %sLegacyConverter INSTANCE = Mappers.getMapper(%sLegacyConverter.class);
 
                 // @Mapping(source = "sourceField", target = "targetField")
-                %sMciReqDto toMciReq(%sReq req);
+                %sLegacyReq toLegacyReq(%sReq req);
                 
-                %sRes toRes(%sMciResDto mciRes);
+                %sRes toRes(%sLegacyRes legacyRes);
             }
             """.formatted(
                 BASE_PACKAGE, shortName,
@@ -320,7 +320,7 @@ public class ToolScaffolder {
                 BASE_PACKAGE, shortName, baseName, author, createDate, createDate, author,
                 baseName, baseName, baseName, baseName, baseName, baseName, baseName
             );
-        Files.writeString(converterDir.resolve(baseName + "MciConverter.java"), converterContent);
+        Files.writeString(converterDir.resolve(baseName + "LegacyConverter.java"), converterContent);
 
         log.append("\n=========================================\n");
         log.append(" Scaffolding Complete!\n");
@@ -328,9 +328,9 @@ public class ToolScaffolder {
         log.append("[Service] ").append(serviceDir.resolve(baseName + "Service.java")).append("\n");
         log.append("[Req DTO] ").append(dtoDir.resolve(baseName + "Req.java")).append("\n");
         log.append("[Res DTO] ").append(dtoDir.resolve(baseName + "Res.java")).append("\n");
-        log.append("[MCI Req DTO] ").append(legacyDtoDir.resolve(baseName + "MciReqDto.java")).append("\n");
-        log.append("[MCI Res DTO] ").append(legacyDtoDir.resolve(baseName + "MciResDto.java")).append("\n");
-        log.append("[MCI Converter] ").append(converterDir.resolve(baseName + "MciConverter.java")).append("\n");
+        log.append("[Legacy Req DTO] ").append(legacyDtoDir.resolve(baseName + "LegacyReq.java")).append("\n");
+        log.append("[Legacy Res DTO] ").append(legacyDtoDir.resolve(baseName + "LegacyRes.java")).append("\n");
+        log.append("[Legacy Converter] ").append(converterDir.resolve(baseName + "LegacyConverter.java")).append("\n");
         log.append("\n Tip: ").append(interfaceId).append(" 목업 데이터를 mock-responses.json에 추가하세요.\n");
         
         return log.toString();
diff --git a/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/converter/SmsMciConverter.java b/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/converter/SmsMciConverter.java
index 482b8d7..14a9fed 100644
--- a/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/converter/SmsMciConverter.java
+++ b/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/converter/SmsMciConverter.java
@@ -1,7 +1,7 @@
 package io.shinhanlife.axhub.biz.mcp.tool.sms.converter;
 
 import io.shinhanlife.axhub.biz.mcp.tool.dto.SmsSendReq;
-import io.shinhanlife.axhub.biz.mcp.tool.sms.dto.SmsMciReqDto;
+import io.shinhanlife.axhub.biz.mcp.tool.sms.dto.SmsLegacyReqDto;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
 import org.mapstruct.factory.Mappers;
@@ -13,5 +13,5 @@ public interface SmsMciConverter {
 
     @Mapping(source = "phoneNumber", target = "phone")
     @Mapping(source = "message", target = "content")
-    SmsMciReqDto toMciReq(SmsSendReq req);
+    SmsLegacyReqDto toMciReq(SmsSendReq req);
 }
diff --git a/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/dto/SmsMciReqDto.java b/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/dto/SmsLegacyReqDto.java
similarity index 91%
rename from axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/dto/SmsMciReqDto.java
rename to axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/dto/SmsLegacyReqDto.java
index 3a6ce0b..12502eb 100644
--- a/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/dto/SmsMciReqDto.java
+++ b/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/dto/SmsLegacyReqDto.java
@@ -5,7 +5,7 @@ import lombok.Getter;
 
 @Getter
 @Builder
-public class SmsMciReqDto {
+public class SmsLegacyReqDto {
     /**
      * EAI 시스템이 요구하는 수신자 번호 파라미터명
      */
diff --git a/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/service/SmsToolService.java b/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/service/SmsToolService.java
index e80e6f5..d88ae68 100644
--- a/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/service/SmsToolService.java
+++ b/axhub-tool-sms/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/sms/service/SmsToolService.java
@@ -4,8 +4,8 @@ import io.shinhanlife.axhub.biz.mcp.tool.annotation.McpFunction;
 import io.shinhanlife.axhub.biz.mcp.tool.annotation.McpTool;
 import io.shinhanlife.axhub.biz.mcp.tool.dto.SmsSendReq;
 import io.shinhanlife.axhub.biz.mcp.tool.service.AbstractMcpToolService;
-import io.shinhanlife.axhub.biz.mcp.tool.sms.dto.SmsMciReqDto;
 import io.shinhanlife.axhub.biz.mcp.tool.sms.converter.SmsMciConverter;
+import io.shinhanlife.axhub.biz.mcp.tool.sms.dto.SmsLegacyReqDto;
 import lombok.extern.slf4j.Slf4j;
 
 import java.util.Map;
@@ -33,7 +33,7 @@ public class SmsToolService extends AbstractMcpToolService {
         log.info("[SMS] SMS 발송 요청 수신. 수신자: {}", req.getPhoneNumber());
 
         // MapStruct를 이용한 자동 매핑 (AI DTO -> MCI DTO)
-        SmsMciReqDto mciReq = SmsMciConverter.INSTANCE.toMciReq(req);
+        SmsLegacyReqDto mciReq = SmsMciConverter.INSTANCE.toMciReq(req);
 
         // 레거시 시스템 연동 (EAI) - DTO 객체를 그대로 넘김
         Map<String, Object> result = executeLegacy("EAI", "SMS_SEND_001", mciReq);