MCP submission still blocked: annotations error despite correct manifest (May 2026)

Hitting the same issue reported in April that was supposedly fixed.

After “Scan Tools” succeeds, the form blocks with: “Each MCP tool must set readOnlyHint, openWorldHint, and destructiveHint to true or false.”

All annotations are present in my manifest (verified via MCP Inspector). Example tool:

{ “name”: “some_name”, “annotations”: { “readOnlyHint”: false, “destructiveHint”: false, “openWorldHint”: false } }

Can someone from OpenAI re-investigate? This was marked fixed April 17 but still blocking submissions as of May 23, 2026.