Spartan Kings clearly pressured by the state to secure military success as is highlighted by the phrase 'the Spartans \[...\] were extremely indignant with Agis for not having conquered Argos when he had such an opportunity"
Indeed, the passage says that he had to beg the state not to pull down his house and fine him 10,000 drachmae.
Apparently he did not even have military authority - **exceptional circumstances but he was given 10 advisors and without their authority he should not be empowered to lead an army out of the city.**
Also states that when a king is leading an army, all instructions are given by him personally