How to use strict = True, with complex data type on fuction call.

[pedrorjbr]

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Example Code

class SearchPatientByRegistrationNumberInput(BaseModel):
   registration_number: Optional[str] = Field(description="CPF informado pelo paciente")
   datetime: str = Field("Datetime on Isoformat")

Description

I have a tool, that has a datetime parameter. I am trying to use strict mode, so on tool_bind, I am passing strict=True.
Looking on trace, it is working, as below, but I would like to pass the format, as below.
{"properties": {"datetime": {"type": "string", "format": "date-time"} }

I suppose that I need to change the input parametrs on pydantic. Any clues?

{
  "type": "function",
  "function": {
    "name": "search_patient",
    "description": "Retorna o patient_id e outra informações sobre um paciente a partir do CPF.",
    "parameters": {
      "properties": {
        "registration_number": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "description": "CPF informado pelo paciente"
        },
        "datetime": {
          "description": "Datetime on Isoformat",
          "type": "string"
        }
      },
      "required": [
        "registration_number",
        "datetime"
      ],
      "type": "object",
      "additionalProperties": false
    },
    "strict": true
  }
}

System Info

langchain==0.3.14
langchain-community==0.3.14
langchain-core==0.3.33
langchain-openai==0.2.14
langchain-pinecone==0.2.2
langchain-tests==0.3.10
langchain-text-splitters==0.3.5

[pedrorjbr]

I just got. You cannot pass format, on using strict=True.