Claim record · Stateful tools in the Model Context Protocol
The requirement that a server's tool set must not vary per connection is new in the 2026-07-28 revision and does not appear in the 2025-11-25 revision.
fact · verified 2026-09-05
- Vendor
- Model Context Protocol project
- Product
- Model Context Protocol
- Subsystem
- protocol
- Deployment
- not restricted
- Region
- not restricted
- Release range
- specification revision 2025-11-25
- Status
- fact
- Confidence
- 0.90
- Verified
- 2026-09-05
Sources
- Model Context Protocol specification 2025-11-25, Server Features: Tools — Model Context Protocol project · tier 1 standards and regulators · Tools page compared across the two revisions
Cite this claim
APA
WarmTransfer. (2026, September 5). Stateful tools in the Model Context Protocol: claim statetool-must-not-vary-is-new-in-2026. WarmTransfer. https://warmtransfer.net/knowledge/claims/statetool-must-not-vary-is-new-in-2026
BibTeX
@misc{warmtransfer-claim-statetool-must-not-vary-is-new-in-2026,
title = {Stateful tools in the Model Context Protocol: claim statetool-must-not-vary-is-new-in-2026},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/statetool-must-not-vary-is-new-in-2026},
note = {Claim statetool-must-not-vary-is-new-in-2026, verified 2026-09-05}
}