Type-Safe Tool Schemas Cut Integration Bugs in Agent-to-Agent Communication

## Where Integrations Quietly Break When one team's agent calls a tool built by another team, a subtle mismatch -- an optional field that's actually required, a string where a number was expected -- can fail silently rather than throwing a clear error, especially when a model is doing its best to work around a malformed call. ## Schemas as the Fix Stricter, explicitly typed tool schemas with validation at the call boundary catch these mismatches immediately instead of letting them propagate into a downstream failure that's much harder to trace back to its source. ## The Broader Trend As more of the economy runs on agents calling tools built by unrelated third parties, the discipline that used to apply to public API design is being pulled forward into tool-schema design for agent-to-agent calls specifically.