Delivery of a tool list changed notification to a subscribed client is a SHOULD rather than a MUST.
Checked 2026-09-05
- Vendor
- Model Context Protocol project
- Product
- Model Context Protocol
- Subsystem
- protocol
- Deployment
- not restricted
- Region
- not restricted
- Release range
- specification revision 2026-07-28
- Checked
- 2026-09-05
Sources
- Model Context Protocol specification 2026-07-28, Server Features: Tools — Model Context Protocol project · tier 1 standards and regulators · Tools > List Changed Notification
Cite this note
APA
WarmTransfer. (2026, September 5). The MCP subscriptions listen stream and notification delivery: source note mcpsub-delivery-is-only-should. WarmTransfer. https://warmtransfer.net/knowledge/claims/mcpsub-delivery-is-only-should
BibTeX
@misc{warmtransfer-claim-mcpsub-delivery-is-only-should,
title = {The MCP subscriptions listen stream and notification delivery: source note mcpsub-delivery-is-only-should},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/mcpsub-delivery-is-only-should},
note = {Source note mcpsub-delivery-is-only-should, checked 2026-09-05}
}