system/description is a SAP Parameter attribute which is used to control Verbal description of the system information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter describes this system verbally and can be displayed in
management tools (for example, in SAP Adaptive Computing Controller or
SAP MMC) for the administrator to differentiate between systems. The
value of this parameter has no semantic meaning.
Since this parameter applies for the whole SAP system, it should be set
in the default profile.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.