diff --git a/server/src/addie/admin-status-lookup.ts b/server/src/addie/admin-status-lookup.ts
index daf2ed7711a..a0d0de44242 100644
--- a/server/src/addie/admin-status-lookup.ts
+++ b/server/src/addie/admin-status-lookup.ts
@@ -36,7 +36,7 @@ const AAO_ADMIN_WORKING_GROUP_SLUG = 'aao-admin';
 // performed an admin grant/revoke. Other replicas must therefore re-check
 // membership quickly enough for an emergency revocation to take effect.
 export const AAO_ADMIN_POSITIVE_CACHE_TTL_MS = 60 * 1000;
-const AAO_ADMIN_NEGATIVE_CACHE_TTL_MS = 5 * 60 * 1000;
+const AAO_ADMIN_NEGATIVE_CACHE_TTL_MS = 60 * 1000;
 
 const wgDb = new WorkingGroupDatabase();
 
diff --git a/server/src/addie/mcp/admin-tools.ts b/server/src/addie/mcp/admin-tools.ts
index 2747ac97a22..c547a8af11b 100644
--- a/server/src/addie/mcp/admin-tools.ts
+++ b/server/src/addie/mcp/admin-tools.ts
@@ -202,7 +202,7 @@ const KITCHEN_CABINET_SLUG = "kitchen-cabinet";
 // Site-admin membership can be revoked on another replica. Keep successful
 // membership decisions short-lived so every replica rechecks within a minute.
 const ADMIN_POSITIVE_CACHE_TTL_MS = 60 * 1000;
-const ADMIN_NEGATIVE_CACHE_TTL_MS = 5 * 60 * 1000;
+const ADMIN_NEGATIVE_CACHE_TTL_MS = 60 * 1000;
 const COUNCIL_CACHE_TTL_MS = 30 * 60 * 1000;
 // Shared cache module — invalidators can be called without dragging the
 // rest of admin-tools (and its Anthropic-instantiating dependencies)
@@ -247,10 +247,9 @@ export async function isSlackUserAAOAdmin(
 
     if (!adminGroup) {
       logger.warn("Admin check: aao-admin working group not found in DB");
-      // Cache the negative result for a shorter time to avoid repeated DB lookups
       adminStatusCache.set(slackUserId, {
         isAdmin: false,
-        expiresAt: Date.now() + 5 * 60 * 1000,
+        expiresAt: Date.now() + ADMIN_NEGATIVE_CACHE_TTL_MS,
       });
       return false;
     }