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Description
Currently FunctionTool does not support default arguments. This is backed up from the docs here: https://google.github.io/adk-docs/tools/function-tools/#parameters
It's important to avoid setting default values for parameters, as the language model (LLM) does not currently support interpreting them.
It could be very helpful to include default arguments within FunctionTools. If they can't be supported, it might be infromative to understand more information surrounding why they can't be used (e.g. if it's a design choice or if it's a limitation beyond the scope of google-adk).