what are we specifically allowed and not allowed to tell the profane?

Freemasons are expected to keep sacred the internal symbolic meanings imparted through their degree work, alongside descriptions of the initiation ceremonies and the modes of recognition 2.

Outside of these private elements, much of what occurs within and around the lodge is not restricted 2. A member may freely discuss the fraternity's charitable endeavors, such as aiding distressed brethren, supporting widows and orphans, and maintaining homes for elderly members 1. The general moral and educational aims of the lodge—including lectures on ethical subjects, musical programs, and social banquets—are similarly open to outside discussion 1.

Furthermore, many physical and administrative aspects of the lodge carry no secrecy 2. These include the time of meetings, the name of the Chaplain, the gavel held by the Master, the Secretary's record books of paid dues, the organ, the choir's music, and the general shape, form, and furniture of the lodge room 2. Historical and biblical references associated with Masonic instruction, such as the pillars of Jachin and Boaz or the narrative of Hiram Abif, are matters of public record found in scripture and printed historical works, so referencing them as such does not constitute revealing a secret 2.

The secrecy of the fraternity pertains to the personal, symbolic instruction given to the candidate and the modes of recognition, rather than its administrative records, outer furnishings, or works of relief and moral instruction 12.