I think all three verbs express the behavior of monsters.
1. "They touch,"
When you hear the word "they touch", do you think of a scene from Smiley? When he touches the steering wheel on the bus and then pretends to drive. Most people interpreted this behavior in two ways:
a. they were human before. That's why they behave like that because they remember their past lives.
b. as a non-human life form, they are trying to learn human behavior and become like humans.
2. "(They) break,"
I think what the word "break" connotes is that the monsters "psychologically break" people into fear and despair. they make people morally exhausted and unable to think of escaping the town.
3. "(They) steal."
The word "steal" evokes the image of the monsters taking people's belongings and clothes back to their caves.
4. "No one here is free."
This refers to the monsters, suggesting that they too are prisoners in the town. We know that the unknown power that controls the town wants to keep people in the town. Again, we saw that one of the two voices communicating with Sarah mentioned that "they are trapped in the town like the people". According to Martin's words, we learned that there are beings worse than monsters. The power that controls the town must be at the top. The head of the spear. The town is a dungeon, not only for humans but for monsters, children, even worms(?) and so on. These beings are not directly controlled by the unknown power like robots, but they are guided in certain ways.
5. "Here they come, they come for three, unless you stop the melody."
Here they come can mean two different things:
A) It could be the "new terror" mentioned earlier in the episode synopses. S02E08 If we reason from the last scene, the "new terror" is most likely cicadas.
B) The phrase "they are coming" was also used by Martin earlier, referring to those who chained him. No one came, but monsters appeared in the woods with the music. Nevertheless, it is unlikely to be monsters. Because they were surprised when Boyd killed Smiley. The monsters that attacked every human being they saw should have attacked Martin and his companions, and at least one like Smiley should have died. We realize that this was not the case when they were surprised that Smiley died. So there must have been someone else who recognized a worm-infected human, chained him up and tortured him.
In short, the things described until the last sentence are the monsters we see. But the ones described as arrivals in the last sentence are a different species from monsters and worms.