Description:
When using a tool input schema with a field of type: array (e.g., ["string"]), the inspector renders the input as a text field, and the value is passed as a single string rather than a proper JSON array. This causes schema validation to fail on the receiving server.

To Reproduce:

1. Define a tool with an inputSchema that includes an array of strings (e.g., type: ["array", "null"], items: { "type": "string" })
2. Attempt to invoke the tool from the inspector
3. Observe the input is passed as a string instead of a list (e.g., "["a", "b"]" instead of ["a", "b"])

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "tags": {
      "type": ["array", "null"],
      "items": {
        "type": "string"
      },
      "description": "Optional list of tags."
    }
  },
  "required": []
}

Expected behavior:
Inspector should recognize array types and provide UI to input a list, or at least pass a properly structured array to the backend.