diff --git a/src/client.ts b/src/client.ts
index e45071d..2f20b86 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -182,7 +182,7 @@ export async function toolsOn(bus: Broker): Promise<Listing> {
     for (const s of roles.seats ?? []) {
       // A node-scoped seat's tool is asked of one machine (design 33 §4): listed with its scope, so
       // a caller names the machine and the call carries it — `seat:<seat>.<verb>@<node>`. Left out
-      // of the listing, the verb never resolved as a seat's and nothing served it (ADR 0169).
+      // of the listing, the verb never resolved as a seat's and nothing served it (ADR 0170).
       for (const t of s.tools ?? []) {
         tools.push({ module: s.seat, name: t.name, description: t.description, input: t.input, seat: true, scope: s.scope });
       }
diff --git a/src/mcp.ts b/src/mcp.ts
index 14d9573..0ba4497 100644
--- a/src/mcp.ts
+++ b/src/mcp.ts
@@ -143,7 +143,7 @@ export function mcpSurface(bus: Broker, who: string): Surface {
           const roles = have && seatsIn(have);
           const bare = given.split("@", 1)[0];
           const isSeatVerb = roles ? toolKey(bare, roles).startsWith("seat:") : false;
-          // A node-scoped seat's verb is asked of one machine (design 33 §4, ADR 0169): `node`
+          // A node-scoped seat's verb is asked of one machine (design 33 §4, ADR 0170): `node`
           // names it and travels in the subject, as for a module's tool.
           const nodeScoped = isSeatVerb && (have?.tools.some((t) => t.seat && t.scope === "node" &&
             `${t.module}.${t.name}` === bare) ?? false);
diff --git a/test/client.test.ts b/test/client.test.ts
index d438524..9c82ba2 100644
--- a/test/client.test.ts
+++ b/test/client.test.ts
@@ -68,7 +68,7 @@ test("a person sees what the running modules answer, sorted, and who did not ans
       "the list is what the modules answered plus every role's tools, in a stable order",
     );
     // A role's tool is marked as one; a node-scoped seat's carries its scope, so a caller names
-    // the machine and the verb resolves as the seat's (design 33 §4, ADR 0169).
+    // the machine and the verb resolves as the seat's (design 33 §4, ADR 0170).
     assert.ok(have.tools.find((x) => x.module === "mesh-controller")!.seat);
     const lookup = have.tools.find((x) => x.module === "node-dns-resolver")!;
     assert.ok(lookup.seat && lookup.scope === "node");
diff --git a/test/mcp.test.ts b/test/mcp.test.ts
index 687bd86..dfec071 100644
--- a/test/mcp.test.ts
+++ b/test/mcp.test.ts
@@ -35,7 +35,7 @@ async function aMeshAndACredential(t: { after: (fn: () => Promise<void> | void)
         { name: "status", description: "what is wrong", input: {} },
         { name: "push", description: "tell a machine", input: { node: { type: "string" } } },
       ] },
-      // A seat held once per machine (design 33 §4, ADR 0169): its verb is asked of one.
+      // A seat held once per machine (design 33 §4, ADR 0170): its verb is asked of one.
       { seat: "node-dns-resolver", scope: "node", tools: [{ name: "lookup", description: "one machine's", input: {} }] },
     ],
   }));
@@ -107,7 +107,7 @@ test("a host initialises, lists the mesh's tools and calls one", async (t) => {
   assert.deepEqual(listed.map((x: { name: string }) => x.name),
     ["mesh-controller.push", "mesh-controller.status", "node-dns-resolver.lookup", "shop.price"],
     "the modules' tools and the roles', named the way a person names them");
-  // A node-scoped seat's verb takes the machine, and requires it (ADR 0169).
+  // A node-scoped seat's verb takes the machine, and requires it (ADR 0170).
   const lookup = listed[2];
   assert.equal(lookup.inputSchema.properties.node.type, "string");
   assert.deepEqual(lookup.inputSchema.required, ["node"]);