In Hesiod’s Theogony, Zeus ordered Hephaestus to make a woman before Pandora appeared.
Theogony presents Pandora’s creation as part of Zeus’s response to Prometheus and humanity. Hephaestus, the divine smith, forms the woman from earth or clay, and other gods contribute qualities or gifts. The passage establishes Pandora as the first woman in Hesiod’s mythic account.
The better-known narrative appears in Works and Days, which gives more detail about Pandora’s gifts, her arrival at Epimetheus’s home, and the opening of the jar. The two poems are related but are not identical retellings. Hesiod’s Theogony is primarily a genealogy and account of divine origins, whereas Works and Days combines myth with advice about justice, labor, and human life.
This question concerns the object Zeus commissioned, not the later container associated with Pandora. The container is introduced in the surrounding story as a separate element.