# MICA

With executable capabilities held fixed, presenting them as MCP tools or as CLI commands still sends language agents down different task trajectories. Built from a shared semantic action contract, the comparison spans six models and three interactive environments, and 94.3% of 2,004 paired episodes show structured divergence. DART, which repairs only the interface expression once a semantic decision is validated, raises benchmark score in all six benchmark–interface settings by up to 9.0 points and lowers MCP token cost in all three environments.

With executable capabilities held fixed, presenting them as MCP tools or as CLI commands still sends language agents down different task trajectories. Built from a shared semantic action contract, the comparison spans six models and three interactive environments, and 94.3% of 2,004 paired episodes show structured divergence. DART, which repairs only the interface expression once a semantic decision is validated, raises benchmark score in all six benchmark–interface settings by up to 9.0 points and lowers MCP token cost in all three environments.