(VB.NET) Automatic JS AI Tool Calling with Supporting JS Sources

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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.
Dim sbJs As New Chilkat.StringBuilder
success = sbJs.LoadFile("qa_data/js_tools/toolset_5.js","utf-8")
If (success = False) Then
    Debug.WriteLine(sbJs.LastErrorText)
    Exit Sub
End If


Dim ai As New Chilkat.Ai

' Additional JavaScript code can be loaded into the AI object's internal JS engine
' by calling RegisterJsTools with evalOnly = True.
Dim sbExtraJs As New Chilkat.StringBuilder
sbExtraJs.Append("function getOrderTotal({ order_id }) { return 149.95; }")

' When evalOnly equals True, it tells Chilkat that no toolRegistry will be present.
' The purpose for doing the eval is to add function definitions to the global namespace.
' The value passed for allowAllKeyword is meaningless (not used) when evalOnly = True.
Dim evalOnly As Boolean = True
Dim allowAllKeyword As Boolean = True
ai.RegisterJsTools(sbExtraJs,evalOnly,allowAllKeyword)

' Register the tools that will be made available to the AI.
evalOnly = False
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) {
  // Here we are calling another function that is defined in a support (additional) JavaScript source
  // that was loaded in previous call to Ai.RegisterJsTools with evalOnly = true.
  return getOrderTotal(arg);
}

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";