If agents are "like humans" (whatever we mean by that), then shouldn't all the lessons we learned over the decades on how to build APIs for direct and indirect human consumption be extremely relevant?
If agents are "like humans" (whatever we mean by that), then shouldn't all the lessons we learned over the decades on how to build APIs for direct and indirect human consumption be extremely relevant?
With human devs, errors become recovery instructions.
400 Bad Request is fine for a client developer who reads it once at design time and fixes the code forever. it's dead weight for an agent that must self-correct from the string alone. "Expected ISO-8601, got 03/04/2025" is now a functional part of the interface.
Not all agents are developers who can code their own interface.