The 'perldoc' command, despite sometimes being split out from the distribution of Perl in some OS packages and/or core OS installs, is important to have installed. It provides access to documentation about the core language as well as to the included libraries (modules). While it's entirely possible to program Perl on a system that doesn't have perldoc installed, it's pretty darn near impossible for someone to program effectively and efficiently without some type of access to perldoc's functionality. (and hence to easily accessible and readable documentation in general)

In short, having access to the proper documentation for your language should fall under 'having the appropriate tools to work effectively' and is the responsibility of your employer to provide.

At the risk of making an assumption about your current situation, I can't help but find it somewhat sadistic that your employer both does not provide the documentation for a language they've assigned a task for and also will not provide the required tools to do your work when requested with the vague reasoning of 'not enough disk space'. Surely you can approach your employers and request that you either be permitted to have access to the documentation for the version of Perl you're working with, possibly on your workstation itself, or possibly via access to a website that has them. You should pay keen attention to finding the documentation appropriate for the version of Perl that you are working with as the language has changed quite significantly in its lifetime.

In addition, although the pointers to documentation that you've received were in response to your original request for information related to 'goto', however I would expect that you'll be very likely to require additional information that is clearly illustrated in the documentation in the future. I hope that you are able to acquire what you need.

Good luck!