The M×N problem of tool calling and open-source models

Article

• Each open-source model uses a different tool-calling wire format, creating M×N parser burden
• Framework maintainers must write and maintain parsers for every model/format combination
• No standard has emerged despite OpenAI’s Harmony format attempt

Discussion

• Some commenters skeptical: writing a multi-format parser isn’t that hard in practice
• Others call it one of the most important AI infrastructure posts of the year
• MCP raised as potential solution, though it operates at a different layer
• Industry fragmentation seen as symptom of still-early ecosystem maturity

Discuss on HN