amber-laravel/app/Models/Tool.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Support\Facades\Http;

class Tool extends Model
{
    protected $fillable = [
        'name',
        'description',
        'url',
        'api_key',
        'callback_url',
        'user_id',
    ];

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function functions(): HasMany
    {
        return $this->hasMany(ToolFunction::class);
    }

    public function fetchFunctions(): void
    {
        $url = $this->url;

        $json = Http::get($url);

        $json = $json->json();

        $this->callback_url = $json['callback_url'];

    }
}