This summary is not the rule. The rule text controls.
Certain people are not allowed to help post bail for a defendant. This includes lawyers, judges, and court officials who work for the court system. They cannot act as a surety, which means they cannot promise to pay if the defendant skips court. They also cannot give money or property to cover someone's bail.
If one of these people does try to post bail anyway, that bail is not valid. But there's an important catch. Even though the bail was set up the wrong way, the court can still enforce it if the defendant fails to show up. In other words, the person who broke this rule cannot use their own mistake as an excuse to get out of paying when the bail is forfeited.
This rule exists to keep the legal system fair. Lawyers, judges, and court officials have power and influence in criminal cases. If they could also pay for a defendant's bail, it could create conflicts of interest or unfair advantages. The rule keeps these roles separate to protect the fairness of the process.