Sponsoring a tool, source or prompt the agent's owner can't use now takes
owning it or having edit access to it; use access alone no longer extends it
to the agent's audience. A save that would make the caller a new sponsor is
refused with 409 sponsor_confirmation_required (the resources and the
agent's audience) until it is retried with confirm_sponsor listing them.
When a sponsor loses access, the resource stops instead of passing to
whoever saves next; another editor takes it over only by confirming.
Workflows follow the same rules. sponsor_details now reports each
sponsorship's state, the reason it stopped, and whether the reader can
take it over.
Every API tool counted as holding the owner's credentials, so outside
callers were refused any write on one even when it sends nothing the
owner stored. Now an action counts only when its headers or query
parameters carry a saved value (sealed or legacy plaintext) or the tool
stores credentials; the allowlist lists just those writes.
Pre-fetch judged someone else's tool by its stored approval flags, which
a remote device or the code executor decides per call, and it took a
widget or API run for the owner because the run carries the owner's id.
Those tools no longer pre-fetch for anyone but their owner, an API-key or
public-link run treats every tool as someone else's, and writes with the
owner's credentials are never pre-fetched for them.
Headless runs searched only the agent's primary source, so an agent whose
knowledge sat in its extra sources answered a schedule or webhook without
it. They now take the primary and every extra source through the same
owner-or-sponsor check a chat uses, shared as one helper, and retrieve
through the per-source dispatcher so each source keeps its own settings.
Tool pre-fetch ran the caller's own active tools, so a teammate chatting
with a shared agent had the owner's prompt fill in from their tools, and
even the owner got every active tool rather than the agent's. It now uses
the toolset the run gets: the agent's tools as its owner or sponsor, or
the caller's tools and defaults outside an agent. Pre-fetch asks nobody,
so on someone else's tool it skips approval-gated actions and anything on
a connected account.
A node's tools resolved as the person running the workflow, so a teammate
or public-link user lost every owner tool they could not use themselves.
They now resolve as the workflow owner, then as the editor who attached
them, like an agent's own tools. The runner stays the invoker, so a
member-mode connection still uses their own account.
arc53-machine