fix: ensure proper return values in custom properties functions

Author: patrick-knight

pkg/github/custom_properties.go

@@ -52,7 +52,7 @@ func GetRepositoryCustomProperties(getClient GetClientFn, t translations.Transla
 				return mcp.NewToolResultError(err.Error()), nil
 			}
 
-			return MarshalledTextResult(props)
+			return MarshalledTextResult(props), nil
 		}
 }
 
@@ -124,7 +124,7 @@ func GetOrganizationCustomProperties(getClient GetClientFn, t translations.Trans
 			if err != nil {
 				return mcp.NewToolResultError(err.Error()), nil
 			}
-			return MarshalledTextResult("Organization custom properties for "+org, props)
+			return MarshalledTextResult(props), nil
 		}
 }
 
@@ -191,7 +191,7 @@ func GetEnterpriseCustomProperties(getClient GetClientFn, t translations.Transla
 			if err != nil {
 				return mcp.NewToolResultError(err.Error()), nil
 			}
-			return MarshalledTextResult(props)
+			return MarshalledTextResult(props), nil
 		}
 }
 

pkg/github/tools.go

@@ -62,12 +62,7 @@ func DefaultToolsetGroup(readOnly bool, getClient GetClientFn, getGQLClient GetG
 		AddWriteTools(func() server.ServerTool {
 			tool, handler := CreateOrUpdateRepositoryCustomProperties(getClient, t)
 			return toolsets.NewServerTool(tool, handler)
-		AddReadTools(
-			toolsets.NewServerTool(GetRepositoryCustomProperties(getClient, t)),
-		).
-		AddWriteTools(
-			toolsets.NewServerTool(CreateOrUpdateRepositoryCustomProperties(getClient, t)),
-		)
+		}())
 	issues := toolsets.NewToolset("issues", "GitHub Issues related tools").
 		AddReadTools(
 			toolsets.NewServerTool(GetIssue(getClient, t)),