When you see information in brackets, these are dialogue stage directions setting actor names

It's the setting.

Explanation:

The actor's name is seen with a colon after it, CHARACTER:

The setting is described in brackets, [Sunny afternoon]

The stage directions are in parenthesis, (stage left)

The dialogue is just written after the character with colon, CHARACTER: Good Morning Sir.

(you didn't attach a copy of the poem, but i'm answering as best as i can)

since a simile compares two unlike things using like or as, it kind of gives an item the ability to do something it can't.

example: "the player was like a tiger on the field"

in this sentence, the simile conveys the idea that the player was fast and strong, like a tiger.