revisão e complementação da documentação do projeto

docs/adr/ADR-003-reauthorization-of-tools-call.en-us.md

@@ -0,0 +1,20 @@
+# ADR-003: Independent reauthorization on tools/call
+
+**Status:** Accepted.
+**Source:** this ADR is the canonical record of this decision. For implementation and validation context, see `RI/docs/AS-BUILT.md` and, where applicable, the relevant contract in `RI/docs/interfaces/`.
+
+## Context
+
+Is filtered `tools/list` sufficient?
+
+## Decision
+
+No — `tools/call` must be reauthorized independently of discovery.
+
+## Alternatives Considered
+
+Relying only on filtered discovery.
+
+## Consequences
+
+EP-05 implements two enforcement points, not one.