StandardToolCallDeserializer

Standard tool call deserializer for most LLM providers (OpenAI, Anthropic, etc.).

Expects a flat JSON array of tool call objects, each containing an id and a function object with name and arguments fields. It is strict: a call that does not have that shape, or whose arguments are not JSON, fails with an exception, which the client's Try around its response parsing turns into a Left. Arguments nested more than 512 levels deep fail the same way, before they are parsed: they are model output, and a value that deep overflows the stack of whatever renders it next (#1562).