The consolidated manage_task tool bundles create/update/delete/move into a
single tool, making it impossible to deny just the delete action via tool
tiers or scope-based filtering.
This adds:
- A `manage` permission level for tasks (between readonly and full)
- A SERVICE_DENIED_ACTIONS registry mapping (service, level) to denied actions
- An is_action_denied() helper that tools call before executing actions
- Guards in manage_task and manage_task_list that reject denied actions
Usage: --permissions tasks:manage
Allows create, update, move. Denies delete.
tasks:full remains unchanged (all actions allowed).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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