For Jira/Confluence, I also struggled with their MCPs. JIRA’s MCPs was hit or miss and Confluence never worked for me.
We don’t use the cloud versions, so not sure if they work better with cloud.
On the other hand, i found some unofficial CLIs for both and they work great.
I wrote a small skill just to give enough detail about how to format Epics, Stories, etc and then some guidance on formatting content and I can get the agent do anything i need with them.