Language agents increasingly act through external tools and interactive environments, making the interface between the model and its executable capabilities part of the decision process. Model Context
Matched interface representations significantly alter agent behavior despite identical executable capabilities, and targeted repair of interface-specific realization improves performance while reducing cost.
Language agents increasingly act through external tools and interactive environments, making the interface between the model and its executable capabilities part of the decision process. Model Context Protocol (MCP) and command-line interfaces (CLI) can expose the same semantic operations through markedly different model-facing representations. We study whether these representational differences change agent behavior when executable capabilities are matched. We introduce Matched Interface Comparison and Analysis (MICA), which renders MCP and CLI from a shared semantic action contract and routes decoded actions through the same runtime. Across six models and three interactive environments,…
Summary and abstract excerpt via Hugging Face Papers ↗ · arXiv.
Matched Capabilities, Different Behaviors: A Controlled Study of MCP and CLI Interfaces for Language Agents was first seen on Hugging Face · Daily papers on Nov 2, 2026. Since then it has appeared in 2 checks on 1 different day. Its best position was #30 of 30, reached on Nov 2, 19:28 UTC. It dropped off the list after Nov 2, 21:28 UTC.
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It was first seen on Nov 2, 2026 and has been on the list on 1 day (2 checks) since.