diff --git a/agents-flex-core/src/main/java/com/agentsflex/core/llm/functions/Parameter.java b/agents-flex-core/src/main/java/com/agentsflex/core/llm/functions/Parameter.java
new file mode 100644
index 0000000..014605f
--- /dev/null
+++ b/agents-flex-core/src/main/java/com/agentsflex/core/llm/functions/Parameter.java
@@ -0,0 +1,88 @@
+/*
+ *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.agentsflex.core.llm.functions;
+
+import java.io.Serializable;
+import java.util.List;
+
+public class Parameter implements Serializable {
+
+    protected String name;
+    protected String type;
+    protected String description;
+    protected String[] enums;
+    protected boolean required = false;
+    protected List<Parameter> children;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public String[] getEnums() {
+        return enums;
+    }
+
+    public void setEnums(String[] enums) {
+        this.enums = enums;
+    }
+
+    public boolean isRequired() {
+        return required;
+    }
+
+    public void setRequired(boolean required) {
+        this.required = required;
+    }
+
+    public List<Parameter> getChildren() {
+        return children;
+    }
+
+    public void setChildren(List<Parameter> children) {
+        this.children = children;
+        if (children != null) {
+            this.type = "object";
+        }
+    }
+
+    public void addChild(Parameter parameter) {
+        if (children == null) {
+            children = new java.util.ArrayList<>();
+        }
+        children.add(parameter);
+        this.type = "object";
+    }
+}