Villains chip stack has fluctuated wildly. Seen him trap a couple of times but also check raise with nada.

I had been plodding along with a standard TAG game.

I'm a micro stakes learner.


Poker Stars - $5.00+0.50 Tournament (#429010284) - Blinds: 150/300 +40 Ante, No Limit Hold'em (9 players)
Poker Stars Hand Converter Tool from CardsChat.com

SB: t5,896
BB Hero: t9,621
UTG: t11,995
UTG+1: t9,976
MP: t23,136
MP+1: t16,860
MP+2: t20,553
CO: t32,031
BTN: t2,444

Pre-flop: (t450) Hero is BB and dealt : :
7 folds, SB calls t150, Hero raises to t900, SB raises to t5,856 (All-in), Hero calls t4,956

Flop: (t11,712) : : : (2 players)

Turn: (t11,712) : : : : (2 players)

River: (t11,712) : : : : : (2 players)


*** SHOW DOWN ***
xuperic: shows [5s Qc] (three of a kind, Kings)
I'm Rooted: shows [9c Ac] (three of a kind, Kings - Ace kicker)
I'm Rooted collected 12072 from pot
xuperic finished the tournament in 1109th place
AgentJSmit is connected
*** SUMMARY ***
Total pot 12072 | Rake 0
Board [2s Ks Jh Kh Kd]
Seat 1: 3stajl folded before Flop (didn't bet)
Seat 2: amoscafe70 folded before Flop (didn't bet)
Seat 3: udaff007 folded before Flop (didn't bet)
Seat 4: peneloopee folded before Flop (didn't bet)
Seat 5: GARRIKELLA70 folded before Flop (didn't bet)
Seat 6: bartsky4545 folded before Flop (didn't bet)
Seat 7: chevichile (button) folded before Flop (didn't bet)
Seat 8: xuperic (small blind) showed [5s Qc] and lost with three of a kind, Kings
Seat 9: I'm Rooted (big blind) showed [9c Ac] and won (12072) with three of a kind, Kings

Looks great to me.
You acquired reads and used them for your benefit. Even if he traps, the times you win are going to outweigh the times you lose here.

Looks fine to me. I'd call.