OpenAI Function Calling & Assistants API
Definition
OpenAI's mechanism for AI models (GPT-4, GPT-4o, o1) to generate structured function call requests. The Assistants API extends this with persistent threads and file handling. Function calling validates parameter schema but does not validate whether the action is safe, authorized, or admissible. Schema correctness ≠ action safety.
Why It Matters
OpenAI function calling is the most widely-used tool-use interface. It validates format (correct parameter types) but not intent (whether the action should happen). A perfectly formatted DELETE FROM users is syntactically valid but potentially catastrophic. The gap between schema validation and execution governance is where incidents occur.
How Exogram Addresses This
Exogram intercepts every OpenAI function call and evaluates it through 8 deterministic policy rules in 0.07ms. Schema enforcement, boundary control, loop protection, and destructive action blocking — all before the tool executes. Works with GPT-4, GPT-4o, o1, and the Assistants API.
Related Terms
Key Takeaways
- → This concept is part of the broader AI governance landscape
- → Production AI requires multiple layers of protection
- → Deterministic enforcement provides zero-error-rate guarantees