Your skill allows you to sway public opinion with your inspiring rhetoric. You may attempt to perform agitate as a free action (that is, it does not take up a character, court or domain action, but is performed in conjunction with another action) by making a small number of speeches and inspiring the masses. You do not need to have a holding in the province (or provinces) in which you perform the agitate action, but you must be physically present.
What is the DC for getting a free agitate action?
Or are you supposed to use your skill bonus instead of the usual modifiers?

If there is not a check required anyone could give speeches for free agitates.
Lead can be used untrained.