A session reads in one composition why a marked tool is not served on a node,
or that the grants part did not answer.
Builds: design 46 7 §6 (the node-engine's composition of the module names the withheld subjects; "withheld unknown: the grants part does not answer"), lead answer A-239 (withheld, withheld-unknown)
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h