Trivial - P5 At the very least it needs an extra space. Should probably also say what the number is. Maybe include both actual size and max allowed size.
{
"ok" : 1,
"n" : 0,
"writeErrors" : [
{
"index" : 0,
"code" : 2,
"errmsg" : "object to insert too large16777217"
}
]
}