custom plugin not always with same parameter values

Hello

 I have an issue with DLP custom plugin because DLP behaviour is not the same depending of DLP incident.
 When we have a DLP incident generated by an email message which contains an archive file as an attchment (zip for example), there
 is two cases :
 - If our DLP policy does not look at attachment, custom plugin API call our script with only information on archive file (for example
 attachment-Name1=test.zip and attachment-Size1=345)
 - If our DLP policy match on attachment content, custom plugin API call our script with all content of archive file. Which usually means
 a lot of attributes (which usually cause issue posted in other forum thread)
 
  Does anyone already face this issue and found a solution ro a workaround ?
 
  Regards