[BUG] Groq API fails to call tools for ToolCallingAgents

[Isaac4real]

Describe the bug
E.g.: for the deep research example where the the search_agent is a ToolCallingAgent, the groq api (via litellm) fails with:

 Error in generating tool call with model:
litellm.BadRequestError: GroqException - {"error":{"message":"Failed to call a 
function. Please adjust your prompt. See 'failed_generation' for more 
details.","type":"invalid_request_error","code":"tool_use_failed","failed_genera
tion":"web_search{\"query\": \"SPFMV and SPCSV in the Pearl Of Africa 2016\", 
\"filter_year\": 2016}\u003c/function\u003e"}}

Code to reproduce the error
Run deep research example

Error logs (if any)
Error in generating tool call with model: litellm.BadRequestError: GroqException - {"error":{"message":"Failed to call a function. Please adjust your prompt. See 'failed_generation' for more details.","type":"invalid_request_error","code":"tool_use_failed","failed_genera tion":"web_search{\"query\": \"SPFMV and SPCSV in the Pearl Of Africa 2016\", \"filter_year\": 2016}\u003c/function\u003e"}}

Expected behavior
A clear and concise description of what you expected to happen.

Packages version:
Run pip freeze | grep smolagents and paste it here.

Additional context
Add any other context about the problem here.