How can you see field comments from mysql client?

show full columns from <table_name>

This is the output:

| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment

I hope this is useful for you

This query will give you much more information than the describe statement:

SELECT * 
FROM information_schema.columns 
WHERE table_name = 'metrics'
AND table_schema = '...' -- Optionally, filter the schema as well, to avoid conflicts