discord-toggle-mute.scpt

-- Record current app so we can switch back to it after.
tell application "System Events"
	set frontmostApplicationName to name of 1st process whose frontmost is true
end tell

-- Switch to Discord and hit cmd-shift-M.
-- This is a built-in keybind and does not require any setup.
tell application "Discord" to activate
tell application "System Events"
	keystroke "m" using {command down, shift down}
	-- Give it some time to register.
	delay 0.1
end tell

-- Return to the previous app.
tell application frontmostApplicationName
	activate
end tell