Antigravity agent plugins weigh eager versus lazy loading of MCP tools

Google DevRel's James O'Reilly compares two ways Antigravity exposes local MCP tools from Agent Plugins to the model.

Eager loading registers each tool as a top-level function with its full schema in every turn's system prompt, which speeds calls but consumes fixed tokens.

Lazy loading, the plugin default, exposes tools through a proxy call_mcp_tool and reads schemas on demand, saving baseline context at the cost of an extra discovery step.