cleanup search_users response

Author: SamMorrowDrums

pkg/github/search.go

@@ -213,12 +213,28 @@ func SearchUsers(getClient GetClientFn, t translations.TranslationHelperFunc) (t
 				}
 				return mcp.NewToolResultError(fmt.Sprintf("failed to search users: %s", string(body))), nil
 			}
-
-			r, err := json.Marshal(result)
+			// marshal only the login field for each user
+			type minimalUser struct {
+				Login     string `json:"login"`
+				ID        int64  `json:"id,omitempty"`
+				HTMLURL   string `json:"html_url,omitempty"`
+				AvatarURL string `json:"avatar_url,omitempty"`
+			}
+			minimalUsers := make([]minimalUser, 0, len(result.Users))
+			for _, user := range result.Users {
+				if user.Login != nil {
+					minimalUsers = append(minimalUsers, minimalUser{
+						Login:     *user.Login,
+						ID:        *user.ID,
+						HTMLURL:   *user.HTMLURL,
+						AvatarURL: *user.AvatarURL,
+					})
+				}
+			}
+			r, err := json.Marshal(minimalUsers)
 			if err != nil {
 				return nil, fmt.Errorf("failed to marshal response: %w", err)
 			}
-
 			return mcp.NewToolResultText(string(r)), nil
 		}
 }