The speaker is visited by desire, but it doesn't arrive as something grand or dangerous. It comes quietly, and the speaker ends up with "a little fur / on my heart and hat," a soft, slightly funny image that suggests desire as something that clings to you, like animal fur or a bit of lint, both close to the feeling and part of how you present yourself to the world.
The second stanza describes these desires as "busy busy things," restless and fussing, almost like small creatures. Yet the speaker calls them "so honest." The final phrase, "the cards," is open to interpretation. It could point to cards held in a game, where nothing is hidden, or to cards sent as greetings. Either way, the poem seems to admit what the speaker wants without shame.
The mood is light, playful, and gently self-aware. Hope here is modest: ordinary wants, openly shown.