OpenAI Agents SDK Python tool boundary

Evidence-backed facts

1. The OpenAI Agents SDK for Python supports hosted tools, function tools, agents-as-tools, and MCP-backed tools. informative
2. The SDK runtime manages model tool requests and invokes configured functions, agents, hosted services, or MCP servers according to the run loop. informative
3. OpenAI API access, hosted-tool configuration, function permissions, MCP trust, guardrails, and approval for sensitive calls remain separate controls. informative
4. A tool declaration or trace does not prove external completion, business authorization, factual correctness, organic use, or production deployment. informative

Primary sources