Tone is an Atlas-Class Titan, designed for skirmishing with enemy titans using it's Tracker Cannon and Homing Rockets. Effective use of it's lock-on functionality can allow Tone to release devastating combos to quickly dispatch enemy Titans.
Despite the 40mm cannon's exceptional performance at range, the small AoE damage from the rounds make it great at clearing rooms with pilots in them.
Before disembarking from Tone, put down a sonar to check if it's safe. Alternatively, sonar for your allies if they are going for a battery.
If you want to grab a battery, step in front of it and place down a particle wall. Remember to back up, then jump out to grab the battery. This ensures you'll be safe from the front while your Tone will guard your back.
Always try to keep enemies at a distance except for Northstar.
Try to land three shots repeatedly to engage a full lock on, then fire missiles and repeat.
In a fight with another titan always use your particle wall and stay behind it, this will also help teammates.
The particle wall is best used in corridors where it fills the width of the corridor.
Use the AoE effect to your advantage.
When you have a full lock always use the missiles.
The sonar can help with the lock on.
With the 40mm Cannon, direct hits are not required for lock-on. Splash damage can also result in a partial lock.
use your core when you are engaged with 2 or more enemy titans.
Tone can commonly be portrayed in a negative light by the community for a multitude of reasons.
This Titan was spotted in official promotional material from Respawn. At the time, whether it was a work in progress, a name placard, or something else spotted during the video, it was safe to assume at this time that Tone (along with Legion) were new Titans. This assumption was proved correct when Respawn announced all the Titans in video form.