[Bug]: MCP Inspector error if generating an MCP tool without parameters

[Jefferson49]

What happened?

Observed with version 1.4.2 and PHP 8.3.14

I generated a MCP tool from an OpenApi.json file. The MCP tool has no parameter. It is a simple GET request with no input.

For the MCP tool, the following input schema was generated:

    public function inputSchema(): array
    {
        return [
            'type' => "object",
            'properties' => [],
            'required' => []
        ];
    }

If I test this tool with MCP Inspector, I get an error message.

If I change the input schema to return stdClass instead of an empty array, the error disappears.

 'properties' => new stdClass,

My question:
Is this behavior a defect in the MCP tool generation of laravel-mcp-server? Should it generate a different input schema (with stdClass)? Or is an defect in MCP Inspector?

How to reproduce the bug

• Generate an MCP tool from an OpenAPI JSON file for an API request without a parameter.
• Start dev server
• Request the list of current MCP tools with MCP Inspector

Package Version

1.4.2

PHP Version

8.3.14

Laravel Version

Development test server on localhost. Started with: composer run dev

Which operating systems does this happen with?

Windows 10

Notes

No response