* fix(python/server): simplify tool JSON Schema for Optional parameters
Pydantic generates {"anyOf": [{"type": "T"}, {"type": "null"}]} for
Optional[T] tool parameters. While valid JSON Schema 2020-12, this
pattern breaks description rendering in the MCP Inspector UI and fails
Gemini API validation (requires top-level type field). MCP signals
optionality via the required array, making the anyOf/null wrapper
redundant.
- Add simplify_optional_schema() utility that collapses nullable anyOf
into flat {"type": "T"} while preserving description, default, title
- Override MCPServer.add_tool() to apply simplification after Pydantic
generates the schema
- Add 12 unit tests for the schema simplifier (test_json_schema.py)
- Add 23 unit tests for tool schema output (test_list_tool_format.py)
- Update server_example.py with representative parameter patterns
including Literal enum types
* docs(python/server): add parameter types and JSON Schema section to tools docs
Document the Python-to-JSON-Schema type mapping, required/optional/nullable
parameter patterns, and Literal enum usage. Includes a note explaining the
anyOf/null simplification that mcp-use applies automatically.
* fix(python/server): address PR review comments on json_schema.py
- Fix _simplify_property docstring: says "in place" but returns new dict
- Fix simplify_optional_schema docstring: document fast-path return when
no properties exist (returns original, not a copy)
- Wrap dict comprehension for line length
* style: format server_example.py
* docs: regenerate API reference for json_schema module
Pietro Zullo