Do I need tools to swap this in?

No. Most of these engines have a simple clip-down airbox cover—pop it open, pull the old filter straight out, drop the new one in, and close the cover back down. Hand work only.

How often should I replace it?

Check your service manual for the interval; typical recommendation is every 15,000–30,000 miles depending on driving conditions. Heavy dust or off-road use shortens that window.

Will this affect my engine performance or fuel economy?

A clean filter improves both—airflow restrictions get worse as the filter loads, so swapping it out restores intake efficiency. You'll notice the difference if your old one was clogged.