requestContext key: the caller's isolation scope, an opaque non-empty string
(a multi-tenant host mints its tenant id here); breakwater never parses the
value. A connector denies a present value of any other kind with
ISOLATION_SCOPE_INVALID, since reading it as no scope would share one
tenant's replay cache, budget and grants with another. Minted by the trusted
runtime — trust boundary 6 applies: never populate it from client input,
model output, or tool results.
requestContext key: the caller's isolation scope, an opaque non-empty string (a multi-tenant host mints its tenant id here); breakwater never parses the value. A connector denies a present value of any other kind with
ISOLATION_SCOPE_INVALID, since reading it as no scope would share one tenant's replay cache, budget and grants with another. Minted by the trusted runtime — trust boundary 6 applies: never populate it from client input, model output, or tool results.