Pattern Defined
Precise Definition: Agent Tool-Calling is an inference pattern where the model
is provided with a set of executable function schemas (tools), allowing it to bridge the gap between text generation and structured action by outputting a valid JSON object for external execution.
Problem Being Solved
Natural language is inherently "fuzzy," but APIs are strictly deterministic. The primary point of failure for AI agents is the Handoff Hallucination, where a model attempts to call a function with the wrong parameters, non-existent keys, or
