Unfortunately, I have dealt with this exact situation. First of all, does your Company have any Policies & Procedures that were implemented that might address this issue? If not, then the decision would be a judgement call you would need to make. While the tools are considered personal property and liability would be that of the maintenance manager, I would evaluate the situation with a level of sympathy and understanding as this incident occurred in a short amount of time and without negligence. In my personal experience, I contacted our Risk Manager and requested that the tools be reimbursed, if not in full, at least 50%. My maintenance manager was amazing, not reimbursing or assisting him with the expense he would incur, would only upset him further and could result in a disgruntled employee that may simply resign. $600 would not make up for losing a maintenance person, having to rehire, interview and train, not to mention the negative impact to your team's overall moral. The tools are being used for property related tasks, there was no malicious intent nor negligence, and if this is someone you respect as a valuable team member, paying the tool reimbursement is the best way to go!