cannot unmarshal bool into Go struct field

[djoreilly]

Using gt=0 constraint on a int field, see here

from typing import Annotated
from pydantic import Field
from fastmcp import FastMCP

mcp = FastMCP("")

@mcp.tool
def process_image(
    width: Annotated[
        int, Field(description="Target width in pixels", gt=0, le=100)
    ] = 50,
) -> str:
    """Process an image with optional resizing."""
    return ""

Gives this:

Warning: Failed to load MCP server 'test-server': conv mcp tool input schema fail(unmarshal): json: cannot unmarshal bool into Go struct field .SchemaAlt.properties.SchemaAlt.exclusiveMinimum of type json.Number, tool name: process_image

   ERROR 

  Failed to create agent: failed to create agent: failed to load MCP tools: all MCP servers failed to load: server
  test-server: conv mcp tool input schema fail(unmarshal): json: cannot unmarshal bool into Go struct field
  .SchemaAlt.properties.SchemaAlt.exclusiveMinimum of type json.Number, tool name: process_image.

The error is coming from here.

This PR mentions exclusiveMinimum conversion getkin/kin-openapi#1102