ADK for TypeScript: API Reference
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    Variable IN_MODEL_TOOL_SYMBOLConst

    IN_MODEL_TOOL_SYMBOL: typeof IN_MODEL_TOOL_SYMBOL = ...

    Marks a tool the model runs itself rather than the framework — see BuiltInTool. Such a tool claims its name in the toolsDict only so a function call naming it can be routed, so a genuinely callable tool of the same name takes precedence over it.