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Hi,

We're developing a custom operation using a bot and have some questions you hopefully can help answer.

1. Does the operation definition validate parameters sent to an operation? E.g. our operation definition contains a parameter entry:

```json
"parameter": [
    {
      "use": "in",
      "name": "start",
      "min": 1,
      "max": "1",
      "type": "dateTime"
    }
]
```

But we can pass anything when calling the operation and the bot will receive it. Is this intended behaviour?

2. If the bot throws an error (`throw new Error()`) when calling the operation, we receive an internal server error as response.

```
POST /Resource/$my-operation
```

Returns:

```
HTTP/1.1 500 Internal Server Error
```

With body:

```
{"msg":"Internal Server Error"}
```

Should we not expect to receive an `OperationOutcome` instead?