The main tool appears to do local spectral unmixing, but the package also ships under-disclosed credential, download, and geocoding utilities that do not fit that purpose.
Review before installing. The documented command appears local, but the package includes extra shared geospatial utilities with credential discovery, hardcoded fallback credentials, external network calls, and user-home caching that are not disclosed in the skill instructions. Install only if you are comfortable with those bundled capabilities or after removing the unused credential/download/geocoding modules and rotating any exposed credentials.