It's good to hear that you are planning a trip to Ireland.
As of right now, it is sufficient to have your NHS COVID Pass to enter Ireland. You will also have to fill out a Passenger Locator Form
Provided that the 'emergency brake' has not been applied for travel from Great Britain, then fully vaccinated persons arriving in Ireland are not required to home-quarantine nor provide negative RT-PCR test results. Only in that circumstance would the requirements change; more detail can be found on the Irish Government website
I hope this information is helpful to you. To stay up to date with the latest COVID news, check out the Traveller Health page here