From 7d7607473d7713d9937cbbbe0bfc635976c511d3 Mon Sep 17 00:00:00 2001
From: Jeremiah Lowin <153965+jlowin@users.noreply.github.com>
Date: Mon, 13 Apr 2026 21:38:13 -0400
Subject: [PATCH] Stop pydantic 2.13 from leaking _WrappedResult docstring into
 tool output schemas (#3918)

---
 .github/workflows/run-upgrade-checks.yml | 2 +-
 src/fastmcp/tools/function_parsing.py    | 2 --
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/.github/workflows/run-upgrade-checks.yml b/.github/workflows/run-upgrade-checks.yml
index 180c25bc0..c94720ba7 100644
--- a/.github/workflows/run-upgrade-checks.yml
+++ b/.github/workflows/run-upgrade-checks.yml
@@ -121,7 +121,7 @@ jobs:
 
             - **ty (type checker)**: New ty releases frequently add stricter checks that flag previously-accepted code. Run `uv run ty check` locally with the latest ty to reproduce. Fix the type errors or bump the ty version floor in `pyproject.toml`.
             - **ruff**: New lint rules or stricter defaults in a ruff upgrade.
-            - **mcp SDK**: Breaking changes in the `mcp` package (new method signatures, renamed types).
+            - **MCP SDK**: Breaking changes in the `mcp` package (new method signatures, renamed types).
 
             ### What to do
 
diff --git a/src/fastmcp/tools/function_parsing.py b/src/fastmcp/tools/function_parsing.py
index 9b9b0870e..50d217ce6 100644
--- a/src/fastmcp/tools/function_parsing.py
+++ b/src/fastmcp/tools/function_parsing.py
@@ -67,8 +67,6 @@ logger = get_logger(__name__)
 
 @dataclass
 class _WrappedResult(Generic[T]):
-    """Generic wrapper for non-object return types."""
-
     result: T