What did Tacitus criticize about Agricola 's military strategy and career?

Although Tacitus wrote highly of Agricola, he did note some concerns that others had about Agricola's strategy. In particular was Agricola's overzealous nature. At times, Tacitus called it optimistic, but when the men were on the battlefield, optimistic might not be the word they were thinking of. Another critique was Agricola's inability to permanently hold the conquered areas. Once his presence was gone, many of the forts were disabled and left or lost in revolt.