422 API Exception - When no tools are defined

[boatcow]

Issue: Error when processing request using custom server without defined tools

Steps to Reproduce:

1. Set up a custom server configuration
2. Attempt to process a request without defining any tools
3. Observe the resulting error

Current Behavior:

When trying to process a request using a custom server without defining any tools, the following error occurs:

Expected Behavior:

The system should be able to process requests without requiring tools to be defined.

Suggested Fix:

Make tools optional in the request processing logic. This would allow the system to handle requests both with and without defined tools.

[sahilsuman933]

Thanks for bringing this up @boatcow. Will fix it.