diff --git a/fastmcp_slim/fastmcp/resources/template.py b/fastmcp_slim/fastmcp/resources/template.py
index 14332ba74..fb1d7832b 100644
--- a/fastmcp_slim/fastmcp/resources/template.py
+++ b/fastmcp_slim/fastmcp/resources/template.py
@@ -580,8 +580,9 @@ class FunctionResourceTemplate(ResourceTemplate):
             try:
                 hints = _resolve_param_hints(fn)
             except NameError:
-                # An annotation naming something we can't import here is not
-                # worth failing registration over; fall back to the raw form.
+                # Pydantic resolves annotations against namespaces this doesn't
+                # see, so a name we can't resolve may still be valid. Fall back
+                # to the raw form rather than failing a working registration.
                 hints = {}
 
             exploded = {