tl;dr: Mistral has filed a patent covering a method where an LLM generates a code block that wraps multiple tool calls, executed server-side in a sandbox. When the code hits a tool call requiring the client, execution pauses, the call is dispatched to the client, and the returned result is substituted back into the code before execution resumes. The final result is then returned to the LLM, effectively patenting code-based (rather than JSON-based) tool calling with client-side execution.