Steel Breaker's Exploit Weakness

[Kudaku]

A player in my campaign came to me with a question today on Exploit Weakness.

Advanced Class Guide, p. 88 wrote:

Exploit Weakness (Ex): At 5th level, as a swift action a steel-breaker can observe a creature or object to find its weak point by succeeding at a Wisdom check, adding her brawler level against a DC of 10 + the object’s hardness or the target’s CR. If it succeeds, the steel-breaker gains a +2 bonus on attack rolls until the end of her turn, and any attacks she makes until the end of her turn ignore the creature or object’s DR or hardness.

A steel-breaker can instead use this ability as a swift action to analyze the movements and expressions of one creature within 30 feet, granting a bonus on Sense Motive checks and Reflex saving throws, as well as a dodge bonus to AC against that opponent equal to 1/2 her brawler level until the start of her next turn. This ability replaces brawler’s strike.

The first half explicitly states that you need to make a roll and explains how the roll breaks down, but the second half simply states that the brawler analyzes the creature, uses a swift action to activate - and then gains various bonuses. If a steel breaker wants to use the second half of this ability, does she still need to make a wisdom check?

[Starbuck_II]

Technically, it'd seems no check needed, but DMs might vary their reading. I clicked FAQ because it is ambiguous.

[Imbicatus]

I play a martial artist monk with the same ability, and I have always assumed it was no roll needed for the defensive application, but it's never come up as the offensive use is much better for the accuracy boost and DR/Hardness bypass.

[Chess Pwn]

I initially thought that you'd need to make the same roll as the attack version, but now I'm not so sure.

[James Risner]

I don't think a roll is required, but expect table variance and be prepared to have to roll when a GM differs in their interpretation.

[dragonhunterq]

I think the wisdom check is required for the defensive ability as well. The wisdom check is an intrinsic part of the ability that you are now using to get a different effect.

Silly simplification: "Sweet Flexibility: make a DC15 acrobatics check to gain an ice-cream. Alternatively use this ability to gain chocolate."
You wouldn't expect to get the chocolate without making that acrobatics check?

[Kudaku]

Thanks for all the replies, good to see we didn't miss something obvious while reading this. Since there does seem to be a bit of ambiguity here, I'd like to encourage everyone to hit the FAQ button on the top post! :)