It does, and Finnish President has asked many times a clarification what it actually means, see [1]. It's his favorite hobby horse, he keeps asking about it, but not getting any clarification from other member states.

Problem is apparently with it is wording, it makes requirement to help any ways available. But apparently it can be interpreted like "give humanitarian aid" or even "send troops to help", depending on reader. It's not clear it's defensive enough.

[1]: https://www.mtvuutiset.fi/artikkeli/niinisto-vaati-suoraa-ke...