The first public dataset containing both instrument and surgical skill assessment annotations in a high-fidelity bench-top phantom (www.store.upsurgeon.com/products/tnsbox/) of the nasal phase of the endoscopic TransSphenoidal Approach (eTSA). The dataset includes 15-videos ({video_number}.mp4), the corresponding mOSATS with level of surgical expertise (mOSATS.csv), and instrument segmentation annotations (annotations.csv). The companion paper with baseline results is titled: "Automated Surgical Skill Assessment in Endoscopic Pituitary Surgery using Real-time Instrument Tracking on a High-fidelity Bench-top Phantom" (Adrito Das et al, in-press). Please cite this paper if you have used this dataset.