[Feature Request] Support Automatic Resolution for DTOs and Form Requests in Tool Actions

[sebasvdonk]

When I define a tool action, I'd love to be able to type-hint a custom Spatie\LaravelData\Data object or a FormRequest in the method signature and have Laravel automatically resolve it, just like it does in a controller.

Currently, it seems the handler is called directly with the raw input array, which bypasses Laravel's dependency injection and leads to a TypeError if you're not expecting an array.

A Quick Example

Here’s what I'm trying to do. I have a simple DTO:

// app/Data/ContactCreateData.php
class ContactCreateData extends \Spatie\LaravelData\Data
{
    public function __construct(
        public string $first_name,
        public string $last_name,
    ) {}
}

And I want to use it directly in my tool action like this:

// app/Mcp/Actions/CreateContactAction.php
class CreateContactAction
{
    // I expect Laravel to automatically create this object from the input
    public function action(ContactCreateData $contactData)
    {
        // ... use the validated DTO
    }
}

When I register this with Mcp::tool() and call it, the application throws a TypeError because my action method gets an array instead of the ContactCreateData object it expects.

// routes/mcp.php
use App\Mcp\Actions\CreateContactAction;
use PhpMcp\Laravel\Facades\Mcp;

Mcp::tool([CreateContactAction::class, 'action'])
    ->name('create_contact');