Should `is_urs_token?` return truthy when when not a valid token?

`is_urs_token?` only returns false if the `token` argument is greater than 100 characters in length. Is this the intended behavior?

```
irb> is_urs_token?("blah")
=> true
irb> is_urs_token?("agaeagaevoaioeaweneoiaga")
=> true
irb> is_urs_token?("agaeagaevoaioeaweneoiaga"*100)
=> false
```