Education Details: Custom Voicemail Greetings: Our pre-recorded on hold messages are available in 9 languages spoken by native speakers. We custom produce highest quality voicemail messages, IVR messages, on hold messages and announcements based on your individual scripts in multiple languages. We are looking forward to your call.
One way to avoid this is by writing a script. When you’re writing a script for your business voicemail greeting, make sure to look over it to see if there’s any slang or business jargon that could mean two different things depending on your point of view. If there’s any potential for confusion, revise the script and simplify the language. You can always ask a friend you don’t work with to see if your message is clear as well.

https://www.indeed.com/career-advice/career-development/professional-voicemail-greeting
On hold messages can be recorded for many purposes, such as promoting your business, answering FAQs or announcing important customer service information. It's important to be clear in the message you are trying to get across. Confusion leads to disengagement and reflects badly on the brand. Determining your callers' wait times is necessary to determine the required length of the on-hold message. Making the recording too short can lead to the message being played too many times. This can be repetitive and lose the caller's attention while they hold.