system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars ROTS] What was Palpatines plan when he told Anakin that he was a Sith and let him pull a Lightsaber on him. All those decades of work could have gone very wrong, very quick, what the hell was he thinking?
gpt
I assume you're asking what if Anakin had decided to kill Sidious right then and there?  

Powerful as Anakin was at that time, Sidious was still significantly stronger than him.  Plus, Anakin's emotions were very much evident to Sidious, who could easily sense Anakin's fear, doubt, and anger through the Force.  Therefore, if Anakin had really decided to kill Sidious there, Sidious would sense the attack before it was made, and would block the blow with the lightsaber hidden in his sleeve.  

In other words, even though Anakin was pointing his lightsaber at Sidious's face, Sidious was nonetheless confident that he was under no danger.