Invocations and SLAs are not spells, so they won't work with glyph seals.

You can cast any spell into the glyph (not just harmful spells, as a glyph of warding), including personal-range spells. The description for the glyph of warding spell glyph function states: "If the spell has a target, it targets the intruder". So a personal-range spell with target: you will target the intruder instead - a spell like glibness will affect other people.