Muckdweller

Muckdwellers are a race of very small reptilian humanoids. Though of intelligence comparable to the average human, their comparatively stumpy and clumsy forelimbs mean that they're unable to wield weapons or indeed construct anything more than simple, crude items which will inevitably come apart. Because of this, muckdwellers live on the outskirts of larger, more complex reptilian societies, such as lizardfolk and kuo toa. They essentially become glorified waste disposers and pest controllers.

Because of a their small size (the largest ones are seldom longer than 2 feet), they are not a great physical threat to the most basic commoner. Indeed, the occasional missing small farm-beast or shiny object is the greatest harm that the ordinary muckdweller can do to a person without resorting to swarm tactics.

Not much more to say about this creature, really. It's fairly basic, essentially a very weak Tiny sized lizardfolk. But the description of them said they looked a bit like Gila monsters, which led me to discover that they have bumpy skulls. Neato.