Those interpretations belong to folklore and personal belief.
From an ecological perspective, a toad may simply be responding to:
moisture + shelter + food + favorable temperature.
That's usually the more useful explanation.
But There Can Be a Positive Environmental Meaning
Although a toad isn't a supernatural omen, its presence can still tell you something interesting.
Toads are part of healthy ecosystems.
Their presence may indicate that your yard provides suitable habitat for amphibians.
They also participate in food webs by eating insects and serving as prey for other animals.
A garden that supports frogs and toads can therefore be biologically diverse.
Instead of immediately trying to eliminate them, some homeowners choose to make outdoor spaces more wildlife-friendly.
How to Make Your Yard Less Attractive to Toads
If you don't want amphibians entering your house, focus on prevention.
Seal entry points
Check the bottom of exterior doors and garage doors.
Door sweeps can help close gaps.