[jameshart]

If the company provides employees with a key to access the office, are they obliged to provide the employee with a keyring on which to put it? A pocket to keep it in? Or are they able to assume that the employee probably would prefer to keep the key on their own keyring, in their own pocket?

I feel the same about 2FA tokens. As a matter of convenience I install the tokens my employer gives me on my personal phone because it makes it easy for me to keep them available at all times.

If for some reason I was unable or unwilling to do so, though, I might expect to be allowed to expense a yubikey.