Carve the schema-bearing parts of SEP-1913 into three independent
experimental extensions, per @localden's "narrower first cut" ask and
the Tool Annotations IG's 2026-05-28 extension-first decision:
- io.modelcontextprotocol/trust-annotations (headline): narrow
data-classification taxonomy (sensitive, untrusted) + open-ended
evidenceRef pointer.
- io.modelcontextprotocol/action-metadata: carries forward SEP-2061
(inputMetadata/returnMetadata/outcomes + requiresReview).
- io.modelcontextprotocol/ifc-fides: FIDES information-flow control as
a profile of evidenceRef, not a wire root.
Adds repo meta (README, MAINTAINERS, CONTRIBUTING, LICENSE) and docs
(sep-disposition, intent-comment, decisions, open-questions,
trust-model, related-work). FIDES demoted to a profile; DataClass and
requiresReview rehomed; maliciousActivityHint and propagation parked on
the SEP-1913 umbrella. Citations index on public sources only.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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