[AftHurrahWinch]

Yes, they are. Like any standard API, it is an orchestration layer that, given a specific input should always execute the same logic and produce a consistent output. Its job is deterministic execution.

The agentic system that uses MCP (e.g., an LLM) is fundamentally non-deterministic. The LLM's decision of which tool to call, when to call it, and what to do with the response is stochastic.