diff --git a/x-pack/plugins/fleet/server/services/agents/update_agent_tags.ts b/x-pack/plugins/fleet/server/services/agents/update_agent_tags.ts
index 79636ecae1015..dad2053f7ed59 100644
--- a/x-pack/plugins/fleet/server/services/agents/update_agent_tags.ts
+++ b/x-pack/plugins/fleet/server/services/agents/update_agent_tags.ts
@@ -11,9 +11,7 @@ import type { ElasticsearchClient, SavedObjectsClientContract } from '@kbn/core/
 import type { Agent } from '../../types';
 import { AgentReassignmentError } from '../../errors';
 
-import { SO_SEARCH_LIMIT } from '../../constants';
-
-import { getAgentDocuments, getAgentsByKuery } from './crud';
+import { getAgentDocuments } from './crud';
 import type { GetAgentsOptions } from '.';
 import { searchHitToAgent } from './helpers';
 import { UpdateAgentTagsActionRunner, updateTagsBatch } from './update_agent_tags_action_runner';
@@ -30,7 +28,7 @@ export async function updateAgentTags(
   tagsToRemove: string[]
 ): Promise<{ actionId: string }> {
   const outgoingErrors: Record<Agent['id'], Error> = {};
-  let givenAgents: Agent[] = [];
+  const givenAgents: Agent[] = [];
 
   if ('agentIds' in options) {
     const givenAgentsResults = await getAgentDocuments(esClient, options.agentIds);
@@ -44,30 +42,17 @@ export async function updateAgentTags(
       }
     }
   } else if ('kuery' in options) {
-    const batchSize = options.batchSize ?? SO_SEARCH_LIMIT;
-    const res = await getAgentsByKuery(esClient, {
-      kuery: options.kuery,
-      showInactive: options.showInactive ?? false,
-      page: 1,
-      perPage: batchSize,
-    });
-    if (res.total <= batchSize) {
-      givenAgents = res.agents;
-    } else {
-      return await new UpdateAgentTagsActionRunner(
-        esClient,
-        soClient,
-        {
-          ...options,
-          batchSize,
-          total: res.total,
-          kuery: options.kuery,
-          tagsToAdd,
-          tagsToRemove,
-        },
-        { pitId: '' }
-      ).runActionAsyncWithRetry();
-    }
+    return await new UpdateAgentTagsActionRunner(
+      esClient,
+      soClient,
+      {
+        ...options,
+        kuery: options.kuery,
+        tagsToAdd,
+        tagsToRemove,
+      },
+      { pitId: '' }
+    ).runActionAsyncWithRetry();
   }
 
   return await updateTagsBatch(soClient, esClient, givenAgents, outgoingErrors, {
diff --git a/x-pack/test/fleet_api_integration/apis/agents/update_agent_tags.ts b/x-pack/test/fleet_api_integration/apis/agents/update_agent_tags.ts
index 65bf277d17ae6..05c1a1f8ae6c7 100644
--- a/x-pack/test/fleet_api_integration/apis/agents/update_agent_tags.ts
+++ b/x-pack/test/fleet_api_integration/apis/agents/update_agent_tags.ts
@@ -68,25 +68,6 @@ export default function (providerContext: FtrProviderContext) {
         expect(agent2data.body.item.tags).to.eql(['existingTag']);
       });
 
-      it('should allow to update tags of multiple agents by kuery', async () => {
-        await supertest
-          .post(`/api/fleet/agents/bulk_update_agent_tags`)
-          .set('kbn-xsrf', 'xxx')
-          .send({
-            agents: 'active: true',
-            tagsToAdd: ['newTag'],
-            tagsToRemove: ['existingTag'],
-          })
-          .expect(200);
-
-        const { body } = await supertest.get(`/api/fleet/agents`).set('kbn-xsrf', 'xxx');
-        expect(body.total).to.eql(4);
-        body.items.forEach((agent: any) => {
-          expect(agent.tags.includes('newTag')).to.be(true);
-          expect(agent.tags.includes('existingTag')).to.be(false);
-        });
-      });
-
       async function pollResult(
         actionId: string,
         nbAgentsAck: number,
@@ -115,7 +96,7 @@ export default function (providerContext: FtrProviderContext) {
         });
       }
 
-      it('should bulk update tags of multiple agents by kuery in batches - add', async () => {
+      it('should bulk update tags of multiple agents by kuery - add', async () => {
         const { body: actionBody } = await supertest
           .post(`/api/fleet/agents/bulk_update_agent_tags`)
           .set('kbn-xsrf', 'xxx')
@@ -123,7 +104,6 @@ export default function (providerContext: FtrProviderContext) {
             agents: 'active: true',
             tagsToAdd: ['newTag'],
             tagsToRemove: [],
-            batchSize: 3,
           })
           .expect(200);
 
@@ -139,7 +119,7 @@ export default function (providerContext: FtrProviderContext) {
         await pollResult(actionId, 4, verifyActionResult);
       });
 
-      it('should bulk update tags of multiple agents by kuery in batches - remove', async () => {
+      it('should bulk update tags of multiple agents by kuery - remove', async () => {
         const { body: actionBody } = await supertest
           .post(`/api/fleet/agents/bulk_update_agent_tags`)
           .set('kbn-xsrf', 'xxx')
@@ -147,7 +127,6 @@ export default function (providerContext: FtrProviderContext) {
             agents: 'active: true',
             tagsToAdd: [],
             tagsToRemove: ['existingTag'],
-            batchSize: 3,
           })
           .expect(200);