Improve external service discovery and tool routing

dev/test_platform_context_mcp.py

@@ -30,16 +30,22 @@ def main():
         state = base / "state"
         runtime = base / "runtime.json"
         (repo / "docs").mkdir(parents=True)
+        (repo / "config").mkdir(parents=True)
         docs.mkdir()
         (repo / "docs/PLATFORM_OVERVIEW.md").write_text("# Athena\nRouter and recovery.\n")
         (repo / "docs/OPERATIONS.md").write_text("# Operations\nUse bounded tools.\n")
         (docs / "PLATFORM_OVERVIEW.md").write_text("# Athena\nRouter and recovery.\n")
+        (repo / "config/service-catalog.json").write_text(json.dumps({
+            "version": 1,
+            "services": [{"id": "test", "name": "Test", "address": "127.0.0.1", "port": 9, "protocol": "tcp", "probe": "tcp"}],
+        }))
         runtime.write_text(json.dumps({"generated_unix": 4102444800, "generated_at": "2100-01-01T00:00:00Z", "source_commit": "abc", "containers": []}))
         m = load_module(repo, docs, runtime, state)
 
-        assert len(m.TOOLS) == 9
+        assert len(m.TOOLS) == 10
         assert m.overview()["source"] == "docs/PLATFORM_OVERVIEW.md"
         assert m.current_state()["available"] is True
+        assert m.external_services()["services"][0]["id"] == "test"
         assert m.search_knowledge({"query": "recovery", "max_results": 3})["count"] >= 1
         assert "Operations" in m.read_source({"path": "docs/OPERATIONS.md"})["content"]
         try: