Code Mode converges agent tool calling into a single exec tool
The shift changes how agent harnesses should be designed: instead of engineering tool schemas and prompts, expose typed functions and let the model orchestrate in code, which also cuts token costs from intermediate outputs. Builders of agent frameworks and MCP servers should consider adding exec-style sandboxes and outputSchema support. Typed JS/Python sandboxes beat bash for chaining MCP tools since models skip shell-escaping and CLI flag discovery.
