(Tcl) Automatic JavaScript AI Tool Function Calling

See more AI Examples

• 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/ai_javascript_tool_function_calling.asp

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load ./chilkat.dll

set success 0

# ----------------------------------------------------------------------------------
# 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.
set sbJs [new_CkStringBuilder]

set success [CkStringBuilder_LoadFile $sbJs "qa_data/js_tools/horoscope_tools.js" "utf-8"]
if {$success == 0} then {
    puts [CkStringBuilder_lastErrorText $sbJs]
    delete_CkStringBuilder $sbJs
    exit
}

set ai [new_CkAi]

# Register the tools that will be made available to the AI.
set evalOnly 0
set allowAllKeyword 1
CkAi_RegisterJsTools $ai $sbJs $evalOnly $allowAllKeyword

# The provider can be "openai", "google", "claude", "grok", "mistral", "custom", etc.
CkAi_put_Provider $ai "openai"
# Use your provider's API key.
CkAi_put_ApiKey $ai "MY_API_KEY"
# Choose a model.
CkAi_put_Model $ai "gpt-5-mini"

# Tool function calling must always occur within a conversation.
set conversation_name "convo_astrology"
set sysMessage "You are a helpful astrologer"
set devMessage "Respond only with a horoscope generated by a tool. Use the tool output as the final answer."
CkAi_NewConvo $ai $conversation_name $sysMessage $devMessage

# Provide inputs
CkAi_InputAddText $ai "What is my horoscope? I am an Aquarius."

# 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.
set success [CkAi_Ask $ai "text"]
if {$success == 0} then {
    puts [CkAi_lastErrorText $ai]
    delete_CkStringBuilder $sbJs
    delete_CkAi $ai
    exit
}

# Get the AI response.
set sbResponse [new_CkStringBuilder]

CkAi_GetOutputTextSb $ai $sbResponse
puts [CkStringBuilder_getAsString $sbResponse]

delete_CkStringBuilder $sbJs
delete_CkAi $ai
delete_CkStringBuilder $sbResponse

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

// ----------------------------
// Tool implementation functions
// -----------------------------
// Tool functions must ALWAYS have just a single argument, which is an object.

// The function name used here must match the "name" in the toolRegistry below.

// By grouping get_compatibility, get_horoscope, toolRegistry, and toolPermissions under the Example object, 
// you are "namespacing" them. This tells anyone reading the code (and the JavaScript engine itself) 
// that these tools belong together and prevents them from clashing with another function that might 
// also be named get_horoscope. 

Example.get_compatibility = function(arg) {
  return  `${arg.sign1} is compatible with ${arg.sign2} in a ${arg.relationship_type} way.`;
}

Example.get_horoscope = function(arg) {
  return  `${arg.sign} : Next Tuesday you will befriend a baby otter.`;
}


// -------------
// Tool Registry
// -------------
// The inputSchema.type must ALWAYS be "object".
// Use this format regardless of the AI provider (ChatGPT, Gemini, Claude, Grok, Mistral, etc.)
Example.toolRegistry = [
  {
    name: "get_horoscope",
    description: "Get today's horoscope for an astrological sign.",
    parameters: {
      properties: {
        sign: { type: "string", description: "An astrological sign like Taurus or Aquarius" }
      },
    }
  },
  {
      name: "get_compatibility",
      description: "Returns compatibility analysis between two zodiac signs, including a score and explanation.",
      parameters: {
        properties: {
          sign1: {
            type: "string", description: "The first zodiac sign (e.g., Aries, Taurus, Gemini)."
          },
          sign2: {
            type: "string", description: "The second zodiac sign (e.g., Aries, Taurus, Gemini)."
          },
          relationship_type: {
            type: "string", description: "Type of compatibility to evaluate. (e.g., romantic, friendship, professional, general)"
          },
          detail_level: {
            type: "string", description: "Level of detail in the response. (e.g., short, medium, detailed)"
          }
        }
      }
  }
];

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