The phrase "a host of agents" is correct and usable in written English.
It can be used to describe a large number of agents or representatives, often in a context where their collective action or presence is significant.
Example: "The investigation involved a host of agents working tirelessly to uncover the truth behind the scandal."
Alternatives: "a multitude of agents" or "a large number of agents".
The appearance of television crews and competitors is perhaps inevitable; alongside them are a host of agents, media executives, Augusta members and big-time players from a host of global industries.
In Little Shop, his cast of depressed lost souls are offered a hint of social and cultural capital in the form of fame – which benefits a host of agents, marketers and merchandisers but turns deadly for the show's heroes.
A host of agents tried to sign up the Jamaican after the championships, yet the sprinter chose Simms.
In the past two decades studies have pointed fingers of suspicion at a host of agents, including the influenza virus, rubella virus and herpes simplex virus.
But why rely on desperate gangsters when you have a host of agents stationed legally inside target nations with diplomatic immunity?
PLGA nanoparticles are being formulated to target specific tumors and deliver a host of agents including chemotherapy drugs or RNAi.
Faneca joins a host of free agents the Jets signed this off-season.
WEAKNESSES -- The Jets lost a host of free agents; right tackle Kareem McKenzie and tight end Anthony Becht may be missed most as blockers in the running game.
United Nations inspectors from the former commission list a host of biological agents found in Iraq, including botulinum toxin, anthrax, camel pox and infectious hemorrhagic conjunctivitis virus.
We can anticipate progressive major changes in temperature, humidity, habitats, vectors, and transmission for a host of infectious agents.
A host of newer agents including rituximab, abatacept, and monoclonal antibodies blocking costimulatory targets are in current clinical trials for lupus nephritis.
