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mcp: do not check metatada on notifications (#1215)

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Fixes #1212
This commit is contained in:
Guglielmo Colombo 2026-09-01 15:30:20 +02:00 • committed by GitHub
commit 2fdabde139
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1 changed files with 133 additions and 2 deletions
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8
mcp/shared.go
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@ -560,7 +560,15 @@ type validatedMeta struct {
// a non-nil error. clientInfo is optional; if present but invalid, an error is
// returned. Otherwise, it returns usesNewProtocol set to true and the populated
// initializeParams.
// Notifications always report usesNewProtocol false and never error.
func validateRequestMeta(req *jsonrpc.Request) (*validatedMeta, error) {
// SEP-2575 defines the `_meta` triple for calls only: NotificationParams
// declares `_meta` optional with no protocolVersion, so a notification
// neither selects the new protocol nor is discarded for carrying an
// incomplete triple.
if !req.IsCall() {
return &validatedMeta{usesNewProtocol: false, initializeParams: nil}, nil
}
meta := extractRequestMeta(req.Params)
if meta == nil {
return &validatedMeta{usesNewProtocol: false, initializeParams: nil}, nil