Lakshmi is one who has all good signs (lakshan.)
Who has all the powers.
Power of Tolerance,adjustment,
Power to withdraw ,
judgement,decision making power.
Power to packup,
Power to face.
Who has all virtues.
Patience,maturity,honesty,cheerfulness. Etc
Lakshmi is one who follows the highest code of conduct.
Who takes care of its family as well as take part in the earning the lively hood or running the businesses of the family.
Her vision & action is so accurate that there is never a slightest mistake in understanding the size of issue at hand & it's much required solution.
Lakshmi is one who has converted all its deep habits & instincts into divinity.
Lakshmi is one who is righteous & obedient to godly directions & dictates.
Lakshmi is one who is a magnet for good fortune & brings luck to everyone where ever she steps in.
Lakshmi brings prosperity to where she goes.
Therefore a lot of cleanliness maintained before she is called.