diff --git a/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentService.cs b/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentService.cs
index c8aee271..e67cd6b8 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentService.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Agents/IAgentService.cs
@@ -26,6 +26,8 @@ public interface IAgentService
 
     bool RenderFunction(Agent agent, FunctionDef def);
 
+    FunctionParametersDef? RenderFunctionProperty(Agent agent, FunctionDef def);
+
     /// <summary>
     /// Get agent detail without trigger any hook.
     /// </summary>
diff --git a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.Rendering.cs b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.Rendering.cs
index 9ce7a7a8..810e101a 100644
--- a/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.Rendering.cs
+++ b/src/Infrastructure/BotSharp.Core/Agents/Services/AgentService.Rendering.cs
@@ -1,5 +1,6 @@
 using BotSharp.Abstraction.Loggers;
 using BotSharp.Abstraction.Templating;
+using Newtonsoft.Json.Linq;
 
 namespace BotSharp.Core.Agents.Services;
 
@@ -32,6 +33,64 @@ public partial class AgentService
         return true;
     }
 
+    public FunctionParametersDef? RenderFunctionProperty(Agent agent, FunctionDef def)
+    {
+        var parameterDef = def?.Parameters;
+        var propertyDef = parameterDef?.Properties;
+        if (propertyDef == null) return null;
+
+        var visibleExpress = "visibility_expression";
+        var root = propertyDef.RootElement;
+        var iterator = root.EnumerateObject();
+        var list = new List<string>();
+        while (iterator.MoveNext())
+        {
+            var prop = iterator.Current;
+            var name = prop.Name;
+            var node = prop.Value;
+            var matched = true;
+            if (node.TryGetProperty(visibleExpress, out var element))
+            {
+                var expression = element.GetString();
+                var render = _services.GetRequiredService<ITemplateRender>();
+                var result = render.Render(expression, new Dictionary<string, object>
+                {
+                    { "states", agent.TemplateDict }
+                });
+                matched = result == "visible";
+            }
+
+            if (matched)
+            {
+                list.Add(name);
+            }
+        }
+
+        var rootObject = JObject.Parse(root.GetRawText());
+        var clonedRoot = rootObject.DeepClone() as JObject;
+        var required = parameterDef?.Required ?? new List<string>();
+        foreach (var property in rootObject.Properties())
+        {
+            if (list.Contains(property.Name))
+            {
+                var value = clonedRoot.GetValue(property.Name) as JObject;
+                if (value != null && value.ContainsKey(visibleExpress))
+                {
+                    value.Remove(visibleExpress);
+                }
+            }
+            else
+            {
+                clonedRoot.Remove(property.Name);
+                required.Remove(property.Name);
+            }
+        }
+
+        parameterDef.Properties = JsonSerializer.Deserialize<JsonDocument>(clonedRoot.ToString());
+        parameterDef.Required = required;
+        return parameterDef; ;
+    }
+
     public string RenderedTemplate(Agent agent, string templateName)
     {
         // render liquid template
diff --git a/src/Plugins/BotSharp.Plugin.AzureOpenAI/Providers/ChatCompletionProvider.cs b/src/Plugins/BotSharp.Plugin.AzureOpenAI/Providers/ChatCompletionProvider.cs
index e3f6afca..0e5cc0ab 100644
--- a/src/Plugins/BotSharp.Plugin.AzureOpenAI/Providers/ChatCompletionProvider.cs
+++ b/src/Plugins/BotSharp.Plugin.AzureOpenAI/Providers/ChatCompletionProvider.cs
@@ -221,11 +221,12 @@ public class ChatCompletionProvider : IChatCompletion
         {
             if (agentService.RenderFunction(agent, function))
             {
+                var property = agentService.RenderFunctionProperty(agent, function);
                 chatCompletionsOptions.Functions.Add(new FunctionDefinition
                 {
                     Name = function.Name,
                     Description = function.Description,
-                    Parameters = BinaryData.FromObjectAsJson(function.Parameters)
+                    Parameters = BinaryData.FromObjectAsJson(property)
                 });
             }
         }
diff --git a/src/Plugins/BotSharp.Plugin.SparkDesk/Providers/ChatCompletionProvider.cs b/src/Plugins/BotSharp.Plugin.SparkDesk/Providers/ChatCompletionProvider.cs
index 3423347e..7d529df1 100644
--- a/src/Plugins/BotSharp.Plugin.SparkDesk/Providers/ChatCompletionProvider.cs
+++ b/src/Plugins/BotSharp.Plugin.SparkDesk/Providers/ChatCompletionProvider.cs
@@ -222,7 +222,7 @@ public class ChatCompletionProvider : IChatCompletion
         return  (prompt, messages.ToArray(), functions.ToArray());       
     }
 
-    private string GetPrompt(List<ChatMessage> messages,List<FunctionDef> functions)
+    private string GetPrompt(List<ChatMessage> messages, List<FunctionDef> functions)
     {
         var prompt = string.Empty;