This summary is not the rule. The rule text controls.
Here's a plain-English summary of this rule:
A subpoena is a legal document that orders someone to show up and testify in court. This rule explains what information must be included on that document for it to be valid.
The subpoena must list the name of the court handling the case and the title of the case itself. It also has to clearly tell the person receiving it when and where they need to show up to testify. Finally, if the testimony relates to a specific side in the case (like the prosecution or the defense), the subpoena must state which party requested that testimony.
In simple terms, this rule makes sure anyone who gets a subpoena has all the basic facts they need. They should know which court is involved, what case it relates to, when and where to appear, and who asked for their testimony. This helps prevent confusion and makes sure people can properly prepare to respond.