OptionalprotocolOptionalinstructionsOptional free-text usage guidance surfaced to the model on initialize.
OptionalresidentTIER-TRIM (C027 tier-trim serving) — the names of the RESIDENT tools. When set, tools/list serves only those
plus a synthetic discover_tools meta-tool; the COLD-TAIL (every other tool) is withheld from the default
surface and revealed on demand when the model calls discover_tools. tools/call still executes ANY tool by
name (cold-tail tools are servable, just not advertised up front) — so the context reduction is real, lossless,
and self-healing. Absent ⇒ the full surface is served (no trim).
Server's preferred protocol version (echoed back only if the client didn't pin a supported one).