Numeric enum without 'type' is uncallable (invalid choice)

[dhruvkej9]

Problem

A JSON Schema property with a numeric enum but no type key is legal and common. schema_type_to_python() returns str whenever type is missing, so argparse parses the flag value as a string and then rejects it against the numeric choices:

$ mcp2cli --mcp-stdio "python server.py" set-level --level 2
usage: mcp2cli set-level [-h] [--stdin] [--level {1,2,3}]
mcp2cli set-level: error: argument --level: invalid choice: '2' (choose from '1', '2', '3')

The tool is uncallable from the CLI — no flag value can ever match.

Reproduction

Minimal stdio MCP server exposing one tool:

{"name": "set_level", "inputSchema": {"type": "object", "properties": {"level": {"enum": [1, 2, 3]}}}}

Verified against v3.5.0 (commit 6b8ae5f).

Expected

--level 2 works and the tool receives the integer 2. The argparse type can be inferred from the enum values when type is absent.