Under the hood
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SendMessage tool adds a suppressesAlwaysAllowRule flag and a richer permission-context object
What
The tool used for sending messages across sessions or between teammates now defines suppressesAlwaysAllowRule, which currently always returns false. The tool's setup was also refactored to build a context object exposing session, storage, credentials, permissions, and proactivity setting information to its permission-checking logic.
Why
This groups together the information needed to decide permissions for cross-session messaging, and the new flag suggests groundwork for controlling whether "always allow" rules can apply to this tool, though it currently has no effect since it always returns false.
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The writer flagged doubt
Since suppressesAlwaysAllowRule always returns false right now, it's unclear what practical effect this has yet.