Your Agenda slide tells the audience the structure of your presentation. Use only one or two words per Agenda item. When speaking about the agenda, only say the words for each item, do not give a detailed explanation of each item and do not start talking about the content matter for each agenda item.
Too Much Text on Agenda
The more text in your agenda slide, the greater the temptation to reveal too many details at this early stage of your presentation – and to repeat these details when you get to each section in your presentation.
I attended a presentation where the speaker gave his entire presentation from the Agenda slide. He then proceeded to give his entire presentation slide by slide.