Assistant cannot process result

I've made a tool of getting name, when it is called it goes to my make and gets the account name from google sheets using account number as a parameter.

The problem is when I'm returning the assistant says that he had problem getting the name.

My Input is: (attached)

My output is:
{
"results": [
{
"toolCallId": "call_ODeJlBr1JQ6aTOAbMbPWRgcu",
"result": "Ask them to confirm if there name is Talha"
}
]
}
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