diff --git a/libs/common/src/lib/scopes.spec.ts b/libs/common/src/lib/scopes.spec.ts
index 97d6ef1f8f..a49a061e53 100644
--- a/libs/common/src/lib/scopes.spec.ts
+++ b/libs/common/src/lib/scopes.spec.ts
@@ -258,9 +258,9 @@ describe('Scopes', () => {
       ).not.toContain(scopes.portfolioReadValues);
     });
 
-    // The controller exposes the tool to import activities as the only tool
-    // which writes, hence a further write scope stays ineffective
-    it('Gives the write scope to create an activity only', () => {
+    // The controller exposes no tool for a further write scope, hence it stays
+    // ineffective
+    it('Gives the write scopes to update an account and to create an activity only', () => {
       expect(
         getScopesOfAccess({
           scopes: [...SCOPES_OF_READ_ACCESS, ...SCOPES_OF_WRITE_ACCESS],
@@ -268,7 +268,7 @@ describe('Scopes', () => {
         }).filter((scope) => {
           return SCOPES_OF_WRITE_ACCESS.includes(scope as Scope);
         })
-      ).toEqual([scopes.activityCreate]);
+      ).toEqual([scopes.accountUpdate, scopes.activityCreate]);
     });
 
     // The dialog narrows the access level to the scopes which the type
diff --git a/libs/common/src/lib/scopes.ts b/libs/common/src/lib/scopes.ts
index 39b1954fc2..de0b17cff5 100644
--- a/libs/common/src/lib/scopes.ts
+++ b/libs/common/src/lib/scopes.ts
@@ -68,7 +68,7 @@ export const SCOPES_OF_READ_RESTRICTED_ACCESS: readonly Scope[] =
  * monetary values.
  */
 const SCOPES_OF_TYPE: Record<AccessType, readonly Scope[]> = {
-  MCP: [...SCOPES_OF_READ_ACCESS, scopes.activityCreate],
+  MCP: [...SCOPES_OF_READ_ACCESS, scopes.accountUpdate, scopes.activityCreate],
   PRIVATE: Object.values(scopes),
   PUBLIC: SCOPES_OF_PUBLIC_ACCESS
 };
diff --git a/prisma/migrations/20261014000000_added_account_update_scope_to_mcp_access/migration.sql b/prisma/migrations/20261014000000_added_account_update_scope_to_mcp_access/migration.sql
new file mode 100644
index 0000000000..fba4918516
--- /dev/null
+++ b/prisma/migrations/20261014000000_added_account_update_scope_to_mcp_access/migration.sql
@@ -0,0 +1,6 @@
+-- Grant the scope to update an account to the existing accesses of the model context protocol which can create an activity
+UPDATE "Access"
+SET "scopes" = array_append("scopes", 'account:update')
+WHERE "type" = 'MCP'
+  AND 'activity:create' = ANY("scopes")
+  AND NOT ('account:update' = ANY("scopes"));