Current capabilities in Voice AI?

Hi, we are trying various things but would be better if there is a published list of current capabilities to test against.

It seems possible to build Procedures that do all sorts of things but the agent seems to have a hard time actually executing the steps.
For instance, which of the following can the agent do (without us building API calls):

Can AI agent actually get a list of existing tickets for a user? I just seems to hallucinate or fail

Can Agent make updates to other tickets than the one created for the call?

Can the agent search Knowledge, summarize articles, and add links in the ticket to the articles it found?

Thanks