feat: Separate tool routing (register) from UI visibility (visible)

axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/annotation/McpFunction.java

@@ -16,4 +16,7 @@ public @interface McpFunction {
     
     // 추가: Redis 자동 등록 및 Heartbeat 대상 여부 제어
     boolean register() default true;
+    
+    // 추가: 툴 목록 노출 여부 제어 (false 시 라우팅은 되나 목록에서 숨김)
+    boolean visible() default true;
 }

axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/config/McpProperties.java

@@ -19,5 +19,6 @@ public class McpProperties {
         private String prompt;
         private String mappingId;
         private Boolean register;
+        private Boolean visible;
     }
 }

axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/dto/ToolMetadata.java

@@ -49,4 +49,9 @@ public class ToolMetadata {
 
     public String getMciServiceId() { return mciServiceId; }
     public void setMciServiceId(String mciServiceId) { this.mciServiceId = mciServiceId; }
+
+    private boolean visible = true;
+
+    public boolean isVisible() { return visible; }
+    public void setVisible(boolean visible) { this.visible = visible; }
 }

axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/service/ToolRegistryHeartbeatSender.java

@@ -77,6 +77,9 @@ public class ToolRegistryHeartbeatSender {
                     meta.setMciServiceId(prop != null && prop.getMappingId() != null ? prop.getMappingId() : functionAnnotation.mappingId());
                     meta.setPodUrl(podUrl);
                     
+                    boolean isVisible = prop != null && prop.getVisible() != null ? prop.getVisible() : functionAnnotation.visible();
+                    meta.setVisible(isVisible);
+                    
                     Map<String, String> prompts = new HashMap<>();
                     String promptText = prop != null && prop.getPrompt() != null ? prop.getPrompt() : functionAnnotation.prompt();
                     prompts.put(functionAnnotation.name(), promptText);