hello.
I'm testing agentBricks right now. As I'm testing, I have a few questions that I'd like to ask.

1) Is it possible to input the schema in a format with input and output?

2) In the free trial, when I create a vector search index and utilize it as a knowledge source, I get the following error.

Maximum number of vector search endpoints per workspace exceeded quota of 1

Is it impossible to create a vector search index in the free trial and utilize it as a Knowledge source to build the Knowledge Assistant?

3) Why do I get the following error? I built Knowledge Assistant by setting UC Files as the Type of Knowledge source.

Vector index type DIRECT_ACCESS is not supported for this workspace.