diff --git a/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_WebSocket_ElevenLabsProxy.cpp b/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_WebSocket_ElevenLabsProxy.cpp
index 7cc5615..8a6e38a 100644
--- a/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_WebSocket_ElevenLabsProxy.cpp
+++ b/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_WebSocket_ElevenLabsProxy.cpp
@@ -685,15 +685,18 @@ void UPS_AI_ConvAgent_WebSocket_ElevenLabsProxy::HandleClientToolCall(const TSha
 	{
 		for (const auto& Pair : (*ParamsObj)->Values)
 		{
+			// UE 5.8 changed FJsonObject::Values from TMap<FString,...> to TMap<FSharedString,...>.
+			// FSharedString has no implicit FString conversion; deref (*) yields const TCHAR*.
+			FString Key(*Pair.Key);
 			FString Value;
 			if (Pair.Value->TryGetString(Value))
 			{
-				ToolCall.Parameters.Add(Pair.Key, Value);
+				ToolCall.Parameters.Add(Key, Value);
 			}
 			else
 			{
 				// For non-string values, serialize to string
-				ToolCall.Parameters.Add(Pair.Key, Pair.Value->AsString());
+				ToolCall.Parameters.Add(Key, Pair.Value->AsString());
 			}
 		}
 	}
diff --git a/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgentEditor/Private/PS_AI_ConvAgent_ToolCustomization_ElevenLabs.cpp b/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgentEditor/Private/PS_AI_ConvAgent_ToolCustomization_ElevenLabs.cpp
index 3f8a54a..00e3e1a 100644
--- a/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgentEditor/Private/PS_AI_ConvAgent_ToolCustomization_ElevenLabs.cpp
+++ b/Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgentEditor/Private/PS_AI_ConvAgent_ToolCustomization_ElevenLabs.cpp
@@ -560,8 +560,10 @@ void FPS_AI_ConvAgent_ToolCustomization_ElevenLabs::OnFetchToolClicked()
 						if (!Pair.Value->TryGetObject(PropObj)) continue;
 
 						FPS_AI_ConvAgent_ToolParameter_ElevenLabs Param;
-						Param.Name = Pair.Key;
-						Param.bRequired = RequiredSet.Contains(Pair.Key);
+						// UE 5.8: FJsonObject::Values key is now FSharedString, convert explicitly.
+						FString KeyStr(*Pair.Key);
+						Param.Name = KeyStr;
+						Param.bRequired = RequiredSet.Contains(KeyStr);
 
 						// Try ElevenLabs format: type-as-key
 						static const TArray<TPair<FString, EPS_AI_ConvAgent_ToolParamType>> TypeKeys = {