There are otherworlders like him since those seated in official position or have a skill that can identify a person stats. The protagonist was not careful on his first day in a town/city, a beginner town/city and he was identified by the Guild Chief/Master. Abruptly the guild head is not all about power/corruption but wants a peaceful security and state so he made a deal for the protagonist and he accept it without incidents of his identity being exposed.

Comparing to Heroes that recently summoned by your usual type of Empire that does work on influence and power. MC is incredibly far stronger than them since unlike summoning. His present situation is reincarnation and given acquired skills and power that far beyond of Heroes norm. An illustration demonstrate that a Summoner like him can dealt 1 on 1 to a silver-haired female swordsman that seem an elite or maybe a Hero via summoned. His Summoned creatures given time that increasing is in comparison as a total sweeping disaster on the whole continent he is. Especially Melfina, the first one as his subordinate is a goddess that can unleashed power beyond.

He gets summoned, after a short and dull dialogue, he's teleported to a city (not literally, just terms of time skip), then he sees the s*aves and the elf, but just moves on with no thoughts, plans or ideas about it, making the event boring. Going into the guild, he signs up so quickly I'm hardly even sure how it works, same with getting an identification, it's barely even touched on. He accepts a quest, story teleports to killing a blue slime, or rather instantly getting another underling, then he goes to the inn with no real dialogue worth of reading and time skips until he ranks up and gets a new quest and some idiot antagonists, after a boring dialogue and some inner monologue, he warps to the castle in another time skip after gaining some gear, where we find out various new skills he seemingly gained before but we were never told of. Then he quickly contracts the black knight in a super short battle and some dialogue and boom he's back to town to complete the quest, talks with the guild master that somehow knows his identity but really nothing happening here, then he buys the elf and in a few paragraphs he has solved her curse right after buying her and she breaks down and is now an instant fanatic of him, then teleport to the inn and talk a little with the elf, this is how this story seems to go and keeps on going all the way

He may be summoning entities sure but I don't think only summoning 3 entities over the course of 5 novels is good enough to be called a "Summoner". In fact, it should be renamed to "Black Warrior" since the author is so hellbent on making him a "battle-junkie".

The Heroes may be presented with status and all but in the end of the day, they don't even need to be introduced. All they amounted to was a punching bag for the MC and if you consider all that is happened prior, they aren't much different from other characters. Seriously, just change their status to adventurers and there would be no difference.

Reincarnation Goddess : Literally falls in love with the MC due to some corny confession during the reincarnation process. Disregarding the corny confession, the number of conversations they had amounted to very few.

Elf Girl : Due to finally being bought despite being a cursed half elf, she immediately falls in love with the MC and bangs with him not too long after.

Demon Girl : As a sheltered girl for the majority of her life, she quickly falls for the MC's charm after being taken in by him.

Reincarnator Girl : After receiving a helping hand by the MC, she develops a brother complex not too long after. And obviously because she's a young teenager, the MC treats her as an adoptive sister so he's not a pe*ophile.