She's a so-so pollinator then, but a wonderful pest control agent for most of the summer. She and her sisters prefer caterpillars for their lunch, and many caterpillars are the worst garden pests. There are thousands of wasp species. Larger ones usually prey on pest insects or spiders. Many of the smaller ones are parasites of pests in their larval stage.
Most wasps are beneficial, and are quite gentle.
Only yellow jackets and the larger nests of social wasps are likely to sting. Most are beneficial because they parasitize pest insects. They also do some pollination. Thanks to Eric Eaton and others for help in identification.