diff --git a/app/MindWork AI Studio/Provider/BaseProvider.cs b/app/MindWork AI Studio/Provider/BaseProvider.cs
index a79c693a..bbf5e4d9 100644
--- a/app/MindWork AI Studio/Provider/BaseProvider.cs	
+++ b/app/MindWork AI Studio/Provider/BaseProvider.cs	
@@ -1249,6 +1249,7 @@ public abstract class BaseProvider : IProvider, ISecretId
             {
                 Id = toolCallId,
                 Type = string.IsNullOrWhiteSpace(returnedToolCall?.Type) ? "function" : returnedToolCall.Type,
+                AdditionalMetadata = returnedToolCall?.AdditionalMetadata ?? new Dictionary<string, JsonElement>(),
                 Function = new ChatCompletionToolFunction
                 {
                     Name = string.IsNullOrWhiteSpace(returnedFunctionName) ? "invalid_tool_call" : returnedFunctionName,
diff --git a/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolCall.cs b/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolCall.cs
index 36850dbf..9c0a38c0 100644
--- a/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolCall.cs	
+++ b/app/MindWork AI Studio/Provider/OpenAI/ChatCompletionToolCall.cs	
@@ -1,3 +1,6 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
 namespace AIStudio.Provider.OpenAI;
 
 public sealed record ChatCompletionToolCall
@@ -7,4 +10,7 @@ public sealed record ChatCompletionToolCall
     public string? Type { get; init; } = "function";
 
     public ChatCompletionToolFunction? Function { get; init; }
+
+    [JsonExtensionData]
+    public IDictionary<string, JsonElement> AdditionalMetadata { get; init; } = new Dictionary<string, JsonElement>();
 }