Hi, I did most of the Agents in both Amarr and Minmatar Low Sec Cosmos Constellations a long time ago. You have to see a ‘Recruiter’ Agent first and complete his mission to gain access to the top Agent in each low sec Cosmos Constellation. The ‘Recruiter’ Agents basically send you to a Training site within the system and when completed, give you a Voucher to access the top Agent. They offer a single mission with no Faction standing loss for killing the NPC’s in the Training site.
The missions in both low sec Cosmos Constellations are basically the same, there’s one level 3 Agent (no Faction standing increase, no BPC) and four level 4 ‘Recruiter’ Agents (Faction standing increase, gives Voucher) with one top Cosmos Agent at each site.
Having said that, I didn’t bother doing the top Cosmos Agents:
Audesder System, Minmatar, Ison Tiadala (Warlord)
Kenobanala System, Amarr, Minas Iksan (Central Control Tower)
They offer a multiple mission series (about 8 missions or so) and according to the info I got there’s Faction standing loss for killing Faction NPC ships. For rewards they don’t give any Storyline Blueprints, Modules, Munitions or Implants, just ISK and the Faction standing increase which is only gained after completing the last mission in their series. That’s mainly why I didn’t do those 2 top Agents.
As for the Faction standing gain and loss, I did a Minmatar ‘Recruiter’ Agent mission and before turning in that mission as completed, went and did an Amar ‘Recruiter’ Agent mission, then turned them both in as completed. That allowed me to keep standings equalized so I could continue accessing the rest of the ‘Recruiter’ Agents.
Hope that helps and good luck to you.