OptionalblobBase64-encoded payload. Exactly one of text or blob must be provided.
Payload MIME type. Must be declared in the contentMimeTypes of the
calling tool's view (its _meta.ui.resourceUri).
OptionaltextPayload as a string. Exactly one of text or blob must be provided.
Ephemeral payload identifier (any scheme except ui://, which is
reserved for renderable UI resources).
Options for creating a dynamic view content block.
See
createViewContentBlock