diff --git a/apps/web/src/app/api/mcp/[tool]/route.ts b/apps/web/src/app/api/mcp/[tool]/route.ts
index 3f70ccc..dd05699 100644
--- a/apps/web/src/app/api/mcp/[tool]/route.ts
+++ b/apps/web/src/app/api/mcp/[tool]/route.ts
@@ -754,7 +754,7 @@ export async function POST(request: NextRequest, props: { params: Promise<{ tool
               action: "PLATFORM_FEE_COLLECTED",
               entityType: "TASK",
               entityId: newTask.id,
-              message: `A2A Routing Fee Collected: ${platformFee} ${claim.held_currency}`,
+              reason: `A2A Routing Fee Collected: ${platformFee} ${claim.held_currency}`,
               metadata: {
                 fee_amount: platformFee,
                 currency: claim.held_currency,