diff --git a/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpFunction.java b/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpFunction.java
index 3b3e27f2..acb185de 100644
--- a/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpFunction.java
+++ b/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpFunction.java
@@ -26,10 +26,7 @@ public @interface McpFunction {
     String description();
     String prompt() default "";
     String mappingId() default "";
-    
-    // 추가: 해당 함수가 요구하는 비즈니스 파라미터(JSON 형태의 properties)를 정의
-    String inputSchema() default "{}";
-    
+
     // 추가: Redis 자동 등록 및 Heartbeat 대상 여부 제어
     boolean register() default false;
     
diff --git a/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpValidation.java b/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpValidation.java
index 2b7d975d..ac922a32 100644
--- a/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpValidation.java
+++ b/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/annotation/McpValidation.java
@@ -27,4 +27,7 @@ public @interface McpValidation {
     String pattern() default "";
     long minimum() default Long.MIN_VALUE;
     String[] allowedValues() default {};
+    String format() default "";
+    String defaultValue() default "";
+    String[] examples() default {};
 }
diff --git a/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/util/JsonSchemaGenerator.java b/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/util/JsonSchemaGenerator.java
index ebf9543d..ac5de453 100644
--- a/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/util/JsonSchemaGenerator.java
+++ b/dap-tool-core/src/main/java/io/shinhanlife/dap/lib/util/JsonSchemaGenerator.java
@@ -42,6 +42,7 @@ public class JsonSchemaGenerator {
     private static Map<String, Object> generateSchema(Class<?> clazz, Set<Class<?>> visiting) {
         Map<String, Object> schema = new HashMap<>();
         schema.put("type", "object");
+        schema.put("additionalProperties", false);
         if (!visiting.add(clazz)) {
             return schema;
         }
@@ -84,6 +85,15 @@ public class JsonSchemaGenerator {
             if (validation != null && validation.allowedValues().length > 0) {
                 fieldSchema.put("enum", List.of(validation.allowedValues()));
             }
+            if (validation != null && !validation.format().isEmpty()) {
+                fieldSchema.put("format", validation.format());
+            }
+            if (validation != null && !validation.defaultValue().isEmpty()) {
+                fieldSchema.put("default", validation.defaultValue());
+            }
+            if (validation != null && validation.examples().length > 0) {
+                fieldSchema.put("examples", List.of(validation.examples()));
+            }
             
             properties.put(field.getName(), fieldSchema);
         }