First person narrative enjoys the senses (sight, sound, touch, smell and taste) of the person narrating. Nobody else. But if the story is as exciting as it should be, that POV alone can keep the reader satisfied from beginning to end. 

It's enough.

Don't force it to describe things it wasn't meant to know. 

EXAMPLE:
   I kept walking, trying to contain my anger, unaware that behind me, Giles had just nodded to a waiting sniper in the bushes. 
CLEANED UP:
   I kept walking, trying to contain my anger, when I felt a sharp pain in my back. 

EXAMPLE:
   He took my hand and led me to the dancefloor. I wasn't aware of anything but him. Not the well-dressed people. Not the multi-colored flashing lights. Not the loud thumping music. I didn't see or hear any of it. 
CLEANED UP:
   He took my hand and led me to the dancefloor. I was transfixed. 
   

EXAMPLE:
   Blindfolded, things sounded louder than normal. Garbage trucks. Horns. Voices. Sali couldn't take his mind off his sick mother, and it showed. 
CLEANED UP:
   Blindfolded, things sounded louder than normal. Garbage trucks. Horns. Voices. Sali told Tony his mother was sick, and sounded upset.

“Who is he?” 

Cairo shook his head and smiled. “You will have to forgive my not answering that question.” 

“Will I?” Spade leaned forward smiling with tight lips. “I've got you by the neck, Cairo. You've walked in and tied yourself up, plenty strong enough to suit the police, with last night's killings. Well, now you'll have to play with me or else.” 

Cairo's smile was demure and not in any way alarmed. “I made somewhat extensive inquiries about you before taking any action,” he said, “and was assured that you were far too reasonable to allow other considerations to interfere with profitable business relations.” 

Spade shrugged. “Where are they?” he asked.

“I have offered you five thousand dollars for--” 

Spade thumped Cairo's wallet with the backs of his fingers and said, “There's nothing like five thousand dollars here. You're betting your eyes. You could come in and say you'd pay me a million for a purple elephant, but what in hell would that mean?” 

- DASHIELL HAMMETT
The Maltese Falcon