> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # ServerToolExecutedBy Who runs the tool call: the model provider during inference (`provider`), OpenRouter (`openrouter`), or the caller's application after the call is returned (`client`). ## Example Usage ```typescript theme={null} import { ServerToolExecutedBy } from "@openrouter/sdk/models"; let value: ServerToolExecutedBy = "openrouter"; // Open enum: unrecognized values are captured as Unrecognized ``` ## Values ```typescript theme={null} "provider" | "openrouter" | "client" | Unrecognized ```