Sawbones is a modified Mister Gutsy with an almost encyclopedic knowledge of surgery, but it lacks the necessary medical subsystem knowledge to carry out operations without causing inadvertent harm to the patient.
If the Lone Wanderer asks Sawbones to be healed it will incompetently wound them instead. With a high enough Science or the Robotics Expert perk, the Lone Wanderer can fix the robot and receive free healing. Sawbones will not be particularly happy about it though.
After repairing Sawbones' malfunction and receiving medical treatment, an effect called "Sawbones' Precision" will appear in your Pip-Boy 3000, giving the Lone Wanderer +2 Endurance and +2 Perception. The effect lasts for about three hours, and it can be gained again by receiving healing from Sawbones.
If you've finished Finding the Garden of Eden but haven't spoken to Elder Lyons, Sawbones will not treat you or even converse with you, but will prompt you to seek him out to start the next quest.
During the dialogue where you fix his malfunction with the Science skill, he states that he cannot engage in combat, however, when you start a firefight in the hall, he will shoot his plasma emitter and blow his flamethrower like a normal Mister Gutsy robot.
If the player's health is low enough, Sawbones can actually kill the player with the malfunction that he has before getting fixed, resulting in the player falling dead on the floor when you exit conversation.
While Sawbones is performing the diagnostic check, elevator music will play.
Sawbones has been exhibiting some worrying behavior, including having an odd penchant for poetry.
Sawbones' terminal, which requires 100 Science to hack, contains a poem of its composition. It also appears that Paladin Glade has hacked into the robot's terminal before and wants Sawbones to change its password.
"Seventeen years ago, a generator in the Citadel overloaded, creating several errors in my artificial intelligence routines. Diagnostics indicate that the limiters placed on my pathways were shorted out, allowing me to gain intelligence beyond the scope of my programming. However, the behavior limiters remain. Therefore it is impossible for me to harm human beings intentionally, much to my regret."
"Sawbones" is a historical slang term for a surgeon, dating back to the early 19th century.
Sawbones is a reference to the Emergency Medical hologram from Star Trek Voyager. When first encountered, it greets the Lone Wanderer with "Please state the nature of the medical emergency," the line delivered by EMH Mk I upon activation. It also has the poor bedside manner that is a hallmark of the EMH Mk I. It is also writing poetry, something that a normal Mister Gutsy wouldn't do. Much like the Doctor, compared to his holographic counterparts.