From 58be2befae161554d26f1612bef2c0dd0075073f Mon Sep 17 00:00:00 2001
From: Aymeric Weinbach <397730+zecloud@users.noreply.github.com>
Date: Thu, 1 Oct 2026 10:13:50 +0200
Subject: [PATCH] Fix McpPropertyType.FLOAT to emit JSON Schema 'number' type

'float' is not a valid JSON Schema type, so MCP clients reject tool
inputSchema generated from McpPropertyType.FLOAT. Type-hint inference
already maps float to 'number'; align the explicit enum with it.

Fixes #367

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
---
 azure/functions/decorators/core.py | 4 ++--
 tests/decorators/test_mcp.py       | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/azure/functions/decorators/core.py b/azure/functions/decorators/core.py
index cbd60b5..b9e3f7d 100644
--- a/azure/functions/decorators/core.py
+++ b/azure/functions/decorators/core.py
@@ -85,8 +85,8 @@ class McpPropertyType(StringifyEnum):
     """MCP property types."""
     INTEGER = "integer"
     """Integer type."""
-    FLOAT = "float"
-    """Float type."""
+    FLOAT = "number"
+    """Float type represented as the JSON Schema "number" type."""
     STRING = "string"
     """String type."""
     BOOLEAN = "boolean"
diff --git a/tests/decorators/test_mcp.py b/tests/decorators/test_mcp.py
index 7a07e44..989153b 100644
--- a/tests/decorators/test_mcp.py
+++ b/tests/decorators/test_mcp.py
@@ -389,7 +389,7 @@ def add_numbers(a) -> int:
         self.assertEqual(trigger.tool_name, "add_numbers")
         self.assertEqual(trigger.tool_properties,
                          '[{"propertyName": "a", '
-                         '"propertyType": "float", '
+                         '"propertyType": "number", '
                          '"description": "", '
                          '"isArray": false, '
                          '"isRequired": true}]')