system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why didn't Mace Wendu tell anyone else apart from the Jedi that went with him about Palpatine being Darth Sidious before confronting him?

Seems like it would be a good idea even if they were confident that they could defeat Palpatine.
gpt
When he was informed, he was already getting set to head out and arrest Palpatine for misuse of power. He took with him three of the highest-ranking Jedi who were still on Coruscant.

So, who could he have told? The majority of the surviving members of the Jedi Council were off-world, and the Senate was basically eating out of Palpatine's hand.

Bringing an army of Jedi youth and elders to arrest Palpatine would damage their already pretty wrecked public image. They didn't have time or the means to withdraw the Council members back to Coruscant, and given how quickly the three Mace *did* take with him met their deaths, anyone else would have gone down just as quickly.

No one outside of the Jedi and a few scholars knew what the Sith were, anyway, so that's not a valid excuse to give for arresting him, either.