Hello,
Interesting idea!
I can do this - I'll add a new placeholder called %url, which will be replaced with the current ULR.
Then I'll add a new default predefined message saying "Summarize page: %url"
This will be then by default visible when you right click anywhere on the page.
I'll add this in the upcoming release in the near future...
Best Regards,
Juraj Mäsiar