Review one multi-step plan, then compile that exact decision into a 60-second, one-shot WebMCP tool. Before approval, the mutation capability does not exist.
MCJB
Launch control
Canonical board · v12
Canonical state untouched until capability call
Preview registry · 0 tools
toolchange events observed: 0
registering…
base ×3→commit_plan→undo_commit
Shared live state
Friday launch
Backlog3
•••
OPS-31
Harden checkout retries
Infrastructure
UnassignedOverdue 1d
OPS-27
Remove duplicate analytics event
Analytics
Jon BellDuplicate
BILL-8Policy lock
Reconcile failed invoices
Billing
FinanceProtected
This week2
•••
OPS-22
Prepare release checklist
Launch
Maya ChenToday
OPS-19
Update incident runbook
Reliability
Jon BellTomorrow
Done1
•••
OPS-14
Verify rollback window
Launch
Maya ChenDone
01
Tool is absent
The agent can inspect and propose, but no mutation capability exists before review.
02
Approval compiles
The edited operations, base version, state hash, lifetime, and digest become one frozen capability.
03
Authority destroys itself
One empty-input call consumes commit_plan; a guarded compensation tool appears from its receipt.