Okay, I'm going to keep saying this until it etches in to everyone's brains...

NO DREAM DICTIONARIES! NOT PERSONAL ENOUGH FOR INTERPRETATION!

:takes a breath and composes self enough to continue:

So animals in dreams are your more primal selves, and often connect with the opposite gender as well. My personal sense of humor is begging for you to be female, so the snake can become a trouser snake joke...but the snake is described as a she, s it's probably the other way around...so I digress...

We often find the literal definition for what the animal is like to be a reflection of what it means in the dream. Anacondas are large, and string. Anacondas hide among the trees, camofauging themselves among the leaves. Then they attack with their bodies, wrapping around their prey and crushing/suffocating them to death. Typically there is a second for of detail that's based on the culture and society you live in, so I have to ask where in the world you live and how do they see snakes, especially large ones like the anaconda?

So this is basically you facing a part of yourself that is primitive and connected to the opposite gender as you. It's strong, but this same strength probably makes it prone to smothering others. Oh, and it's deceptive, only smothering others when they've gotten so close it's too late to back away. Deception is common in the image of the snake, and often the lies are not simply outward at others but could also be lies you tell yourself. My bet here is that you are lying to yourself about how what the snake represents is strength.

But in this dream you are given a tool, that appears in your hand. First, since it's in hand, this implies action. It's not something you know (at your head), or feel (at your heart), or is even spiritual (above you). It's there. For you to use. And it's a stick with a knife. Blades in general, when used at tools, are typically some access to truth. Blades separate and reveal. When you cut into something what is inside is revealed...painfully. I'd guess that whatever causes you to smother others is something you're starting to see is also doing you harm. So it lashes out, and you are given the ability to overcome it. At its basic level, the simple awareness of this threat has overcome it.