diff --git a/backend/src/main/java/com/zl/mjga/component/DepartmentOperatorTool.java b/backend/src/main/java/com/zl/mjga/component/DepartmentOperatorTool.java
index 7d5b4d2..f40b9f6 100644
--- a/backend/src/main/java/com/zl/mjga/component/DepartmentOperatorTool.java
+++ b/backend/src/main/java/com/zl/mjga/component/DepartmentOperatorTool.java
@@ -6,6 +6,7 @@ import com.zl.mjga.service.DepartmentService;
 import dev.langchain4j.agent.tool.P;
 import dev.langchain4j.agent.tool.Tool;
 import dev.langchain4j.model.output.structured.Description;
+import jakarta.validation.constraints.Size;
 import lombok.RequiredArgsConstructor;
 import org.apache.commons.lang3.StringUtils;
 import org.jooq.generated.mjga.tables.pojos.Department;
@@ -21,7 +22,8 @@ public class DepartmentOperatorTool {
 
   @Tool(value = "创建部门")
   void createDepartment(
-      @P(value = "部门名称") String name, @P(value = "上级部门名称", required = false) String parentName) {
+      @P(value = "部门名称") @Size(min = 2, max = 15) String name,
+      @P(value = "上级部门名称", required = false) @Size(min = 2, max = 15) String parentName) {
     Department exist = departmentRepository.fetchOneByName(name);
     Department department = new Department(null, name, null);
     if (exist != null) {
diff --git a/backend/src/main/java/com/zl/mjga/component/PositionOperatorTool.java b/backend/src/main/java/com/zl/mjga/component/PositionOperatorTool.java
index 0615397..1b8ef50 100644
--- a/backend/src/main/java/com/zl/mjga/component/PositionOperatorTool.java
+++ b/backend/src/main/java/com/zl/mjga/component/PositionOperatorTool.java
@@ -5,6 +5,7 @@ import com.zl.mjga.repository.PositionRepository;
 import dev.langchain4j.agent.tool.P;
 import dev.langchain4j.agent.tool.Tool;
 import dev.langchain4j.model.output.structured.Description;
+import jakarta.validation.constraints.Size;
 import lombok.RequiredArgsConstructor;
 import org.jooq.generated.mjga.tables.pojos.Position;
 import org.springframework.stereotype.Component;
@@ -17,7 +18,7 @@ public class PositionOperatorTool {
   private final PositionRepository positionRepository;
 
   @Tool(value = "创建岗位")
-  void createPosition(@P("岗位名称") String name) {
+  void createPosition(@P("岗位名称") @Size(min = 2, max = 15) String name) {
     Position position = positionRepository.fetchOneByName(name);
     if (position != null) {
       throw new BusinessException("岗位已存在");
diff --git a/backend/src/main/java/com/zl/mjga/component/UserRolePermissionOperatorTool.java b/backend/src/main/java/com/zl/mjga/component/UserRolePermissionOperatorTool.java
index 8f0aec4..4ae5045 100644
--- a/backend/src/main/java/com/zl/mjga/component/UserRolePermissionOperatorTool.java
+++ b/backend/src/main/java/com/zl/mjga/component/UserRolePermissionOperatorTool.java
@@ -11,6 +11,7 @@ import com.zl.mjga.service.IdentityAccessService;
 import dev.langchain4j.agent.tool.P;
 import dev.langchain4j.agent.tool.Tool;
 import dev.langchain4j.model.output.structured.Description;
+import jakarta.validation.constraints.Size;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.apache.commons.lang3.StringUtils;
@@ -31,7 +32,7 @@ public class UserRolePermissionOperatorTool {
   private final PositionRepository positionRepository;
 
   @Tool(value = {"创建用户", "入职申请", "开通账号"})
-  void createUser(@P(value = "用户名") String name) {
+  void createUser(@P(value = "用户名") @Size(min = 1, max = 15) String name) {
     User user = userRepository.fetchOneByUsername(name);
     if (user != null) {
       throw new BusinessException("用户已存在");
diff --git a/frontend/src/components/UserUpsertModal.vue b/frontend/src/components/UserUpsertModal.vue
index 021230a..f0c6b9a 100644
--- a/frontend/src/components/UserUpsertModal.vue
+++ b/frontend/src/components/UserUpsertModal.vue
@@ -154,7 +154,7 @@ const handleSubmit = async () => {
 				.string({
 					message: "用户名不能为空",
 				})
-				.min(4, "用户名至少4个字符")
+				.min(1, "用户名至少1个字符")
 				.max(15, "用户名最多15个字符"),
 			enable: z.boolean({
 				message: "状态不能为空",