The 2026-07-28 revision permits tool schema properties to carry an x-mcp-header annotation that exposes parameter values as HTTP headers.

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 2026-07-28
Status
fact
Confidence
0.90
Verified
2026-09-05

Sources

Cite this claim

APA

WarmTransfer. (2026, September 5). Tool schema signature monitoring and drift handling: claim sigdrift-spec-x-mcp-header. WarmTransfer. https://warmtransfer.net/knowledge/claims/sigdrift-spec-x-mcp-header

BibTeX

@misc{warmtransfer-claim-sigdrift-spec-x-mcp-header,
  title  = {Tool schema signature monitoring and drift handling: claim sigdrift-spec-x-mcp-header},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/sigdrift-spec-x-mcp-header},
  note   = {Claim sigdrift-spec-x-mcp-header, verified 2026-09-05}
}

Read this claim in context