WTH Automations, select service why not show a template of service data?

Archive Month of "What the heck?!" (2020)
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1

When creating a new automation from the GUI I often send telegram messages (this request applies to all service calls though).
When I select the service I have to find out myself what the service data should look like. It would be really nice when this automatically shows up as template text.

Edit: this information is available in documentation, I expect also in code to be able to perform the actual action?. Example of documentation: https://www.home-assistant.io/integrations/telegram_bot/

2

This is really WTH. In “Developer Tools” → “SERVICES” you can see these parameters with example data. Should be not too much work to add this info to the GUI as well.