(VB.NET) Automatic JavaScript AI Tool Returning a Number

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• Tool function implementations are in JavaScript.
• The JavaScript also provides a tool registry and permissions.
• The JavaScript runs embedded within your application using Chilkat.Js.
• Tool calls are handled entirely within Chilkat. Your application does not need to manually check for function calls in the AI response. Internal to the Ask function, Chilkat will handle function calls by calling your registered JavaScript tools and will send results back to the AI model until the final response is received.

Note: This example requires Chilkat v11.4.0 or greater.

For more information, see https://www.chilkatsoft.com/automatic_ai_javascript_tool_function_calling.asp

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Dim success As Boolean = False

' ----------------------------------------------------------------------------------
' The Javascript file loaded here is shown at the bottom of this page.
' -----------------------------------------------------------------------------------

' In this example, we'll load the Javascript tool functions and registry from a file.
' It doesn't need to come from a file.  It could just as easily be loaded from a string.
Dim sbJs As New Chilkat.StringBuilder
success = sbJs.LoadFile("qa_data/js_tools/toolset_3.js","utf-8")
If (success = False) Then
    Debug.WriteLine(sbJs.LastErrorText)
    Exit Sub
End If


Dim ai As New Chilkat.Ai

' Register the tools that will be made available to the AI.
Dim evalOnly As Boolean = False
Dim allowAllKeyword As Boolean = True
ai.RegisterJsTools(sbJs,evalOnly,allowAllKeyword)

' The provider can be "openai", "google", "claude", "grok", "mistral", "custom", etc.
ai.Provider = "openai"
' Use your provider's API key.
ai.ApiKey = "MY_API_KEY"
' Choose a model.
ai.Model = "gpt-5-mini"

' Tool function calling must always occur within a conversation.
Dim conversation_name As String = "convo_4"
Dim sysMessage As String = "You are a helpful business assistant"
Dim devMessage As String = "Respond only with a information generated by a tool."
ai.NewConvo(conversation_name,sysMessage,devMessage)

' Provide inputs
ai.InputAddText("What is the total for order A123?")

' Send inputs, tool functions, etc. and ask for a "text" response.
' If the AI responds with tool calls, Chilkat automatically handles them by calling your JavaScript
' tool functions as directed by the AI, and sending results back to the AI until the final
' response is received.
success = ai.Ask("text")
If (success = False) Then
    Debug.WriteLine(ai.LastErrorText)
    Exit Sub
End If


' Get the AI response.
Dim sbResponse As New Chilkat.StringBuilder
ai.GetOutputTextSb(sbResponse)
Debug.WriteLine(sbResponse.GetAsString())

// The namespace for the AI tool functions in this JavaScript source file.
Example = {};

// Tool functions must have only one argument, which should be an object.
// The function names used here must match the "name" in the toolRegistry below.

Example.get_order_total = function(arg) {
  return 149.95;
}

Example.multiply_numbers = function(arg) {
  return arg.a * arg.b;
}

// The inputSchema.type must ALWAYS be "object".
Example.toolRegistry = [
  {
    name: "get_order_total",
    description: "Calculate total cost of an order",
    parameters: {
      properties: {
        order_id: { type: "string", description: "The order ID" },
      }
    }
  },
  {
    name: "multiply_numbers",
    description: "Multiplies two numbers and returns the product.",
    parameters: {
      properties: {
        a: { type: "number", description: "First number" },
        b: { type: "number", description: "Second number" }
      }
    }
  }
];


Example.toolPermissions = [
	  {
	    name: "all",
	    perm: "sandbox",
	  }
	  		
	];
	
	
// Return the name of this toolset
// This tells Chilkat the namespace of this toolset.
"Example";