Bug: Error when processing JSON schema with array items having multiple value types

[twinity1]

Description

When using a schema that includes an array of custom fields with multiple possible value types, the tool fails with an "unhashable type: 'list'" error.

Error Message

Error gathering tools: unhashable type: 'list'
Traceback (most recent call last):
  ...
  File "/Users/ales/.local/share/uv/tools/mcp-client-cli/lib/python3.13/site-packages/jsonschema_pydantic/transform.py", line 60, in convert_type
    return type_mapping.get(type_, Any)
  TypeError: unhashable type: 'list'

Reproduction Steps

1. Define a schema with a customFields array that has items with multiple possible value types
2. The schema includes a structure like:

{
  "name": "update-issue",
  "description": "Update fields of an existing Redmine issue",
  "inputSchema": {
    "type": "object",
    "properties": {
      ... other fields ...
      "customFields": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "id": {
              "type": "number",
              "description": "Custom field ID"
            },
            "value": {
              "type": ["string", "number", "boolean"], // multiple types
              "description": "Custom field value"
            }
          },
          "required": ["id", "value"],
          "additionalProperties": false
        },
        "description": "Custom fields array [{id: number, value: any}]"
      }
    },
    "additionalProperties": false,
    "$schema": "http://json-schema.org/draft-07/schema#"
  }
}

Thank you for developing this tool!