The information you seek might be in PANS OPS or ICAO Annex 14 (?)
Essentially the message is that the crew hold responsibility for terrain clearance irrespective of what ATC ‘suggests’; poorly phrased ATC messages can imply approval which biases the belief of safety.
Do not descend early .
Examples:-
https://www.icao.int/safety/fsix/Lib...plus%20add.pdf
N.B. incident 8
”ATC may have issued an early ‘visual’ approach clearance which was misunderstood as a clearance for further descent to 4300ft, (which is only safe within 9.3nm).”