RageAgainstThePixel · StephenHodgson · Feb 27, 2024 · Feb 27, 2024 · Feb 27, 2024
@@ -133,7 +133,7 @@ public async Task Test_02_01_GetChatToolCompletion()
 
             var messages = new List<Message>
             {
-                new(Role.System, "You are a helpful weather assistant.\n\r- Always prompt the user for their location."),
+                new(Role.System, "You are a helpful weather assistant. Always ask the user for their location."),
                 new(Role.User, "What's the weather like today?"),
             };
 
@@ -143,7 +143,7 @@ public async Task Test_02_01_GetChatToolCompletion()
             }
 
             var tools = Tool.GetAllAvailableTools(false, forceUpdate: true, clearCache: true);
-            var chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "auto");
+            var chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "none");
             var response = await OpenAIClient.ChatEndpoint.GetCompletionAsync(chatRequest);
             Assert.IsNotNull(response);
             Assert.IsNotNull(response.Choices);
@@ -179,6 +179,7 @@ public async Task Test_02_01_GetChatToolCompletion()
             }
 
             Assert.IsTrue(response.FirstChoice.FinishReason == "tool_calls");
+            Assert.IsTrue(response.FirstChoice.Message.ToolCalls.Count == 1);
             var usedTool = response.FirstChoice.Message.ToolCalls[0];
             Assert.IsNotNull(usedTool);
             Assert.IsTrue(usedTool.Function.Name.Contains(nameof(WeatherService.GetCurrentWeatherAsync)));
@@ -188,7 +189,7 @@ public async Task Test_02_01_GetChatToolCompletion()
             Assert.IsNotNull(functionResult);
             messages.Add(new Message(usedTool, functionResult));
             Console.WriteLine($"{Role.Tool}: {functionResult}");
-            chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "auto");
+            chatRequest = new ChatRequest(messages);
             response = await OpenAIClient.ChatEndpoint.GetCompletionAsync(chatRequest);
             Console.WriteLine(response);
         }
@@ -199,7 +200,7 @@ public async Task Test_02_02_GetChatToolCompletion_Streaming()
             Assert.IsNotNull(OpenAIClient.ChatEndpoint);
             var messages = new List<Message>
             {
-                new(Role.System, "You are a helpful weather assistant.\n\r- Always prompt the user for their location."),
+                new(Role.System, "You are a helpful weather assistant. Always prompt the user for their location."),
                 new(Role.User, "What's the weather like today?"),
             };
 
@@ -209,7 +210,7 @@ public async Task Test_02_02_GetChatToolCompletion_Streaming()
             }
 
             var tools = Tool.GetAllAvailableTools(false);
-            var chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "auto");
+            var chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "none");
             var response = await OpenAIClient.ChatEndpoint.StreamCompletionAsync(chatRequest, partialResponse =>
             {
                 Assert.IsNotNull(partialResponse);
@@ -236,7 +237,7 @@ public async Task Test_02_02_GetChatToolCompletion_Streaming()
             Assert.IsTrue(response.Choices.Count == 1);
             messages.Add(response.FirstChoice.Message);
 
-            if (!string.IsNullOrEmpty(response.ToString()))
+            if (response.FirstChoice.FinishReason == "stop")
             {
                 Console.WriteLine($"{response.FirstChoice.Message.Role}: {response.FirstChoice} | Finish Reason: {response.FirstChoice.FinishReason}");
 
@@ -256,6 +257,7 @@ public async Task Test_02_02_GetChatToolCompletion_Streaming()
             }
 
             Assert.IsTrue(response.FirstChoice.FinishReason == "tool_calls");
+            Assert.IsTrue(response.FirstChoice.Message.ToolCalls.Count == 1);
             var usedTool = response.FirstChoice.Message.ToolCalls[0];
             Assert.IsNotNull(usedTool);
             Assert.IsTrue(usedTool.Function.Name.Contains(nameof(WeatherService.GetCurrentWeatherAsync)));
@@ -266,7 +268,7 @@ public async Task Test_02_02_GetChatToolCompletion_Streaming()
             messages.Add(new Message(usedTool, functionResult));
             Console.WriteLine($"{Role.Tool}: {functionResult}");
 
-            chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "auto");
+            chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "none");
             response = await OpenAIClient.ChatEndpoint.StreamCompletionAsync(chatRequest, partialResponse =>
             {
                 Assert.IsNotNull(partialResponse);
@@ -282,7 +284,7 @@ public async Task Test_02_03_ChatCompletion_Multiple_Tools_Streaming()
             Assert.IsNotNull(OpenAIClient.ChatEndpoint);
             var messages = new List<Message>
             {
-                new(Role.System, "You are a helpful weather assistant.\n\r - Use the appropriate unit based on geographical location."),
+                new(Role.System, "You are a helpful weather assistant. Use the appropriate unit based on geographical location."),
                 new(Role.User, "What's the weather like today in Los Angeles, USA and Tokyo, Japan?"),
             };
 
@@ -309,7 +311,7 @@ public async Task Test_02_03_ChatCompletion_Multiple_Tools_Streaming()
                 messages.Add(new Message(toolCall, output));
             }
 
-            chatRequest = new ChatRequest(messages, model: "gpt-4-turbo-preview", tools: tools, toolChoice: "auto");
+            chatRequest = new ChatRequest(messages, model: "gpt-4-turbo-preview", tools: tools, toolChoice: "none");
             response = await OpenAIClient.ChatEndpoint.GetCompletionAsync(chatRequest);
 
             Assert.IsNotNull(response);
@@ -331,7 +333,7 @@ public async Task Test_02_04_GetChatToolForceCompletion()
             }
 
             var tools = Tool.GetAllAvailableTools(false, forceUpdate: true, clearCache: true);
-            var chatRequest = new ChatRequest(messages, tools: tools);
+            var chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "none");
             var response = await OpenAIClient.ChatEndpoint.GetCompletionAsync(chatRequest);
             Assert.IsNotNull(response);
             Assert.IsNotNull(response.Choices);
@@ -356,6 +358,7 @@ public async Task Test_02_04_GetChatToolForceCompletion()
             messages.Add(response.FirstChoice.Message);
 
             Assert.IsTrue(response.FirstChoice.FinishReason == "stop");
+            Assert.IsTrue(response.FirstChoice.Message.ToolCalls.Count == 1);
             var usedTool = response.FirstChoice.Message.ToolCalls[0];
             Assert.IsNotNull(usedTool);
             Assert.IsTrue(usedTool.Function.Name.Contains(nameof(WeatherService.GetCurrentWeatherAsync)));

@@ -376,14 +376,22 @@ public async Task Test_07_01_SubmitToolOutput()
             }
 
             var toolCall = run.RequiredAction.SubmitToolOutputs.ToolCalls[0];
+            Assert.IsTrue(run.RequiredAction.SubmitToolOutputs.ToolCalls.Count == 1);
             Assert.AreEqual("function", toolCall.Type);
             Assert.IsNotNull(toolCall.FunctionCall);
             Assert.IsTrue(toolCall.FunctionCall.Name.Contains(nameof(WeatherService.GetCurrentWeatherAsync)));
             Assert.IsNotNull(toolCall.FunctionCall.Arguments);
             Console.WriteLine($"tool call arguments: {toolCall.FunctionCall.Arguments}");
-            var toolOutput = await testAssistant.GetToolOutputAsync(toolCall);
-            Console.WriteLine($"tool call output: {toolOutput.Output}");
-            run = await run.SubmitToolOutputsAsync(toolOutput);
+
+            // Invoke all the tool call functions and return the tool outputs.
+            var toolOutputs = await testAssistant.GetToolOutputsAsync(run.RequiredAction.SubmitToolOutputs.ToolCalls);
+
+            foreach (var toolOutput in toolOutputs)
+            {
+                Console.WriteLine($"tool output: {toolOutput}");
+            }
+
+            run = await run.SubmitToolOutputsAsync(toolOutputs);
             // waiting while run in Queued and InProgress
             run = await run.WaitForStatusChangeAsync();
             Assert.AreEqual(RunStatus.Completed, run.Status);

@@ -13,8 +13,10 @@ internal enum WeatherUnit
             Fahrenheit
         }
 
-        [Function("Get the current weather in a given location")]
-        public static async Task<string> GetCurrentWeatherAsync(string location, WeatherUnit unit)
+        [Function("Get the current weather in a given location.")]
+        public static async Task<string> GetCurrentWeatherAsync(
+           [FunctionParameter("The location the user is currently in.")] string location,
+           [FunctionParameter("The units the use has requested temperature in. Typically this is based on the users location.")] WeatherUnit unit)
         {
             var temp = new Random().Next(-10, 40);
 

@@ -253,12 +253,12 @@ public string Invoke()
                 }
 
                 var result = Invoke<object>();
-                return JsonSerializer.Serialize(new { result });
+                return JsonSerializer.Serialize(new { result }, OpenAIClient.JsonSerializationOptions);
             }
             catch (Exception e)
             {
                 Console.WriteLine(e);
-                return JsonSerializer.Serialize(new { error = e.Message });
+                return JsonSerializer.Serialize(new { error = e.Message }, OpenAIClient.JsonSerializationOptions);
             }
         }
 
@@ -305,12 +305,12 @@ public async Task<string> InvokeAsync(CancellationToken cancellationToken = defa
                 }
 
                 var result = await InvokeAsync<object>(cancellationToken);
-                return JsonSerializer.Serialize(new { result });
+                return JsonSerializer.Serialize(new { result }, OpenAIClient.JsonSerializationOptions);
             }
             catch (Exception e)
             {
                 Console.WriteLine(e);
-                return JsonSerializer.Serialize(new { error = e.Message });
+                return JsonSerializer.Serialize(new { error = e.Message }, OpenAIClient.JsonSerializationOptions);
             }
         }
 
@@ -384,7 +384,7 @@ public async Task<T> InvokeAsync<T>(CancellationToken cancellationToken = defaul
                     }
                     else if (value is string @enum && parameter.ParameterType.IsEnum)
                     {
-                        invokeArgs[i] = Enum.Parse(parameter.ParameterType, @enum);
+                        invokeArgs[i] = Enum.Parse(parameter.ParameterType, @enum, true);
                     }
                     else if (value is JsonElement element)
                     {

@@ -0,0 +1,17 @@
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+
+using System;
+
+namespace OpenAI
+{
+    [AttributeUsage(AttributeTargets.Parameter)]
+    public sealed class FunctionParameterAttribute : Attribute
+    {
+        public FunctionParameterAttribute(string description)
+        {
+            Description = description;
+        }
+
+        public string Description { get; }
+    }
+}
@@ -46,6 +46,13 @@ public static JsonObject GenerateJsonSchema(this MethodInfo methodInfo)
                 }
 
                 schema["properties"]![parameter.Name] = GenerateJsonSchema(parameter.ParameterType);
+
+                var functionParameterAttribute = parameter.GetCustomAttribute<FunctionParameterAttribute>();
+
+                if (functionParameterAttribute != null)
+                {
+                    schema["properties"]![parameter.Name]!["description"] = functionParameterAttribute.Description;
+                }
             }
 
             if (requiredParameters.Count > 0)

@@ -28,12 +28,14 @@ More context [on Roger Pincombe's blog](https://rogerpincombe.com/openai-dotnet-
     <AssemblyOriginatorKeyFile>OpenAI-DotNet.pfx</AssemblyOriginatorKeyFile>
     <IncludeSymbols>True</IncludeSymbols>
     <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
-    <Version>7.7.1</Version>
+    <Version>7.7.2</Version>
     <PackageReleaseNotes>
+Version 7.7.2
+- Added FunctionParameterAttribute to help better inform the feature how to format the Function json
 Version 7.7.1
 - More Function utilities and invoking methods
   - Added FunctionPropertyAttribute to help better inform the feature how to format the Function json
-  - Added FromFunc-&gt;,-&lt; overloads for convenance
+  - Added FromFunc&lt;,&gt; overloads for convenance
   - Fixed invoke args sometimes being casting to wrong type
   - Added additional protections for static and instanced function calls
   - Added additional tool utilities:

@@ -766,23 +766,30 @@ Console.WriteLine($"Modify run {run.Id} -> {run.Metadata["key"]}");
 
 ##### [Thread Submit Tool Outputs to Run](https://platform.openai.com/docs/api-reference/runs/submitToolOutputs)
 
-When a run has the status: `requires_action` and `required_action.type` is `submit_tool_outputs`, this endpoint can be used to submit the outputs from the tool calls once they're all completed. All outputs must be submitted in a single request.
+When a run has the status: `requires_action` and `required_action.type` is `submit_tool_outputs`, this endpoint can be used to submit the outputs from the tool calls once they're all completed.
+All outputs must be submitted in a single request.
 
 ```csharp
 using var api = new OpenAIClient();
 var tools = new List<Tool>
 {
     // Use a predefined tool
-    Tool.Retrieval,
+    Tool.Retrieval, Tool.CodeInterpreter,
     // Or create a tool from a type and the name of the method you want to use for function calling
-    Tool.GetOrCreateTool(typeof(WeatherService), nameof(WeatherService.GetCurrentWeatherAsync))
+    Tool.GetOrCreateTool(typeof(WeatherService), nameof(WeatherService.GetCurrentWeatherAsync)),
+    // Pass in an instance of an object to call a method on it
+    Tool.GetOrCreateTool(OpenAIClient.ImagesEndPoint, nameof(ImagesEndpoint.GenerateImageAsync))),
+    // Define func<,> callbacks
+    Tool.FromFunc("name_of_func", () => { /* callback function */ }),
+    Tool.FromFunc<T1,T2,TResult>("func_with_multiple_params", (t1, t2) => { /* logic that calculates return value */ return tResult; })
 };
 var assistantRequest = new CreateAssistantRequest(tools: tools, instructions: "You are a helpful weather assistant. Use the appropriate unit based on geographical location.");
 var testAssistant = await OpenAIClient.AssistantsEndpoint.CreateAssistantAsync(assistantRequest);
 var run = await testAssistant.CreateThreadAndRunAsync("I'm in Kuala-Lumpur, please tell me what's the temperature now?");
 // waiting while run is Queued and InProgress
 run = await run.WaitForStatusChangeAsync();
-// Invoke all of the tool call functions and return the tool outputs.
+
+// Invoke all the tool call functions and return the tool outputs.
 var toolOutputs = await testAssistant.GetToolOutputsAsync(run.RequiredAction.SubmitToolOutputs.ToolCalls);
 
 foreach (var toolOutput in toolOutputs)
@@ -913,13 +920,11 @@ Console.WriteLine(cumulativeDelta);
 
 #### [Chat Tools](https://platform.openai.com/docs/guides/function-calling)
 
-> Only available with the latest 0613 model series!
-
 ```csharp
 using var api = new OpenAIClient();
 var messages = new List<Message>
 {
-    new Message(Role.System, "You are a helpful weather assistant."),
+    new(Role.System, "You are a helpful weather assistant. Always prompt the user for their location."),
     new Message(Role.User, "What's the weather like today?"),
 };
 
@@ -929,7 +934,14 @@ foreach (var message in messages)
 }
 
 // Define the tools that the assistant is able to use:
-var tools = Tool.GetAllAvailableTools(includeDefaults: false);
+// 1. Get a list of all the static methods decorated with FunctionAttribute
+var tools = Tool.GetAllAvailableTools(includeDefaults: false, forceUpdate: true, clearCache: true);
+// 2. Define a custom list of tools:
+var tools = new List<Tool>
+{
+    Tool.GetOrCreateTool(objectInstance, "TheNameOfTheMethodToCall"),
+    Tool.FromFunc("a_custom_name_for_your_function", ()=> { /* Some logic to run */ })
+};
 var chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "auto");
 var response = await api.ChatEndpoint.GetCompletionAsync(chatRequest);
 messages.Add(response.FirstChoice.Message);
@@ -944,24 +956,29 @@ response = await api.ChatEndpoint.GetCompletionAsync(chatRequest);
 
 messages.Add(response.FirstChoice.Message);
 
-if (!string.IsNullOrEmpty(response.ToString()))
+if (response.FirstChoice.FinishReason == "stop")
 {
     Console.WriteLine($"{response.FirstChoice.Message.Role}: {response.FirstChoice} | Finish Reason: {response.FirstChoice.FinishReason}");
 
-    var unitMessage = new Message(Role.User, "celsius");
+    var unitMessage = new Message(Role.User, "Fahrenheit");
     messages.Add(unitMessage);
     Console.WriteLine($"{unitMessage.Role}: {unitMessage.Content}");
     chatRequest = new ChatRequest(messages, tools: tools, toolChoice: "auto");
     response = await api.ChatEndpoint.GetCompletionAsync(chatRequest);
 }
 
-var usedTool = response.FirstChoice.Message.ToolCalls[0];
-Console.WriteLine($"{response.FirstChoice.Message.Role}: {usedTool.Function.Name} | Finish Reason: {response.FirstChoice.FinishReason}");
-Console.WriteLine($"{usedTool.Function.Arguments}");
-// Invoke the used tool to get the function result!
-var functionResult = await usedTool.InvokeFunctionAsync();
-messages.Add(new Message(usedTool, functionResult));
-Console.WriteLine($"{Role.Tool}: {functionResult}");
+// iterate over all tool calls and invoke them
+foreach (var toolCall in response.FirstChoice.Message.ToolCalls)
+{
+    Console.WriteLine($"{response.FirstChoice.Message.Role}: {toolCall.Function.Name} | Finish Reason: {response.FirstChoice.FinishReason}");
+    Console.WriteLine($"{toolCall.Function.Arguments}");
+    // Invokes function to get a generic json result to return for tool call.
+    var functionResult = await toolCall.InvokeFunctionAsync();
+    // If you know the return type and do additional processing you can use generic overload
+    var functionResult = await toolCall.InvokeFunctionAsync<string>();
+    messages.Add(new Message(toolCall, functionResult));
+    Console.WriteLine($"{Role.Tool}: {functionResult}");
+}
 // System: You are a helpful weather assistant.
 // User: What's the weather like today?
 // Assistant: Sure, may I know your current location? | Finish Reason: stop
@@ -971,7 +988,7 @@ Console.WriteLine($"{Role.Tool}: {functionResult}");
 //   "location": "Glasgow, Scotland",
 //   "unit": "celsius"
 // }
-// Tool: The current weather in Glasgow, Scotland is 20 celsius
+// Tool: The current weather in Glasgow, Scotland is 39°C.
 ```
 
 #### [Chat Vision](https://platform.openai.com/docs/guides/vision)