diff --git a/x-pack/plugins/elastic_assistant/server/routes/attack_discovery/helpers.test.ts b/x-pack/plugins/elastic_assistant/server/routes/attack_discovery/helpers.test.ts
index 15877e6727715..d5eaf7d159618 100644
--- a/x-pack/plugins/elastic_assistant/server/routes/attack_discovery/helpers.test.ts
+++ b/x-pack/plugins/elastic_assistant/server/routes/attack_discovery/helpers.test.ts
@@ -196,7 +196,6 @@ describe('helpers', () => {
         langChainTimeout,
         llm,
         logger: mockLogger,
-        modelExists: false,
         onNewReplacements,
         replacements: latestReplacements,
         request: mockRequest,
@@ -231,7 +230,6 @@ describe('helpers', () => {
         langChainTimeout,
         llm,
         logger: mockLogger,
-        modelExists: false,
         onNewReplacements,
         replacements: latestReplacements,
         request: mockRequest,
diff --git a/x-pack/plugins/security_solution/server/assistant/tools/alert_counts/alert_counts_tool.test.ts b/x-pack/plugins/security_solution/server/assistant/tools/alert_counts/alert_counts_tool.test.ts
index 752f8e472a755..814a00853927f 100644
--- a/x-pack/plugins/security_solution/server/assistant/tools/alert_counts/alert_counts_tool.test.ts
+++ b/x-pack/plugins/security_solution/server/assistant/tools/alert_counts/alert_counts_tool.test.ts
@@ -29,13 +29,11 @@ describe('AlertCountsTool', () => {
   } as unknown as KibanaRequest<unknown, unknown, ExecuteConnectorRequestBody>;
   const isEnabledKnowledgeBase = true;
   const chain = {} as unknown as RetrievalQAChain;
-  const modelExists = true;
   const logger = loggerMock.create();
   const rest = {
     isEnabledKnowledgeBase,
     chain,
     logger,
-    modelExists,
   };
 
   beforeEach(() => {
diff --git a/x-pack/plugins/security_solution/server/assistant/tools/attack_discovery/attack_discovery_tool.test.ts b/x-pack/plugins/security_solution/server/assistant/tools/attack_discovery/attack_discovery_tool.test.ts
index 5d8fb0b51739a..4d06751f57d7d 100644
--- a/x-pack/plugins/security_solution/server/assistant/tools/attack_discovery/attack_discovery_tool.test.ts
+++ b/x-pack/plugins/security_solution/server/assistant/tools/attack_discovery/attack_discovery_tool.test.ts
@@ -75,7 +75,6 @@ describe('AttackDiscoveryTool', () => {
     isEnabledKnowledgeBase: false,
     llm,
     logger,
-    modelExists: false,
     onNewReplacements: jest.fn(),
     size,
   };
diff --git a/x-pack/plugins/security_solution/server/assistant/tools/esql/nl_to_esql_tool.test.ts b/x-pack/plugins/security_solution/server/assistant/tools/esql/nl_to_esql_tool.test.ts
index 2a9766fe586de..10b1fa21daefe 100644
--- a/x-pack/plugins/security_solution/server/assistant/tools/esql/nl_to_esql_tool.test.ts
+++ b/x-pack/plugins/security_solution/server/assistant/tools/esql/nl_to_esql_tool.test.ts
@@ -41,7 +41,6 @@ describe('NaturalLanguageESQLTool', () => {
     inference,
     connectorId,
     isEnabledKnowledgeBase: true,
-    modelExists: true,
   };
 
   describe('isSupported', () => {
@@ -53,8 +52,6 @@ describe('NaturalLanguageESQLTool', () => {
   describe('getTool', () => {
     it('returns null if inference plugin is not provided', () => {
       const tool = NL_TO_ESQL_TOOL.getTool({
-        isEnabledKnowledgeBase: true,
-        modelExists: true,
         ...rest,
         inference: undefined,
       });
@@ -64,8 +61,6 @@ describe('NaturalLanguageESQLTool', () => {
 
     it('returns null if connectorId is not provided', () => {
       const tool = NL_TO_ESQL_TOOL.getTool({
-        isEnabledKnowledgeBase: true,
-        modelExists: true,
         ...rest,
         connectorId: undefined,
       });
@@ -73,10 +68,8 @@ describe('NaturalLanguageESQLTool', () => {
       expect(tool).toBeNull();
     });
 
-    it('should return a Tool instance if isEnabledKnowledgeBase and modelExists are true', () => {
+    it('should return a Tool instance when given required properties', () => {
       const tool = NL_TO_ESQL_TOOL.getTool({
-        isEnabledKnowledgeBase: true,
-        modelExists: true,
         ...rest,
       });
 
@@ -85,8 +78,6 @@ describe('NaturalLanguageESQLTool', () => {
 
     it('should return a tool with the expected tags', () => {
       const tool = NL_TO_ESQL_TOOL.getTool({
-        isEnabledKnowledgeBase: true,
-        modelExists: true,
         ...rest,
       }) as DynamicTool;
 
@@ -95,8 +86,6 @@ describe('NaturalLanguageESQLTool', () => {
 
     it('should return tool with the expected description for OSS model', () => {
       const tool = NL_TO_ESQL_TOOL.getTool({
-        isEnabledKnowledgeBase: true,
-        modelExists: true,
         isOssModel: true,
         ...rest,
       }) as DynamicTool;
@@ -106,8 +95,6 @@ describe('NaturalLanguageESQLTool', () => {
 
     it('should return tool with the expected description for non-OSS model', () => {
       const tool = NL_TO_ESQL_TOOL.getTool({
-        isEnabledKnowledgeBase: true,
-        modelExists: true,
         isOssModel: false,
         ...rest,
       }) as DynamicTool;
diff --git a/x-pack/plugins/security_solution/server/assistant/tools/open_and_acknowledged_alerts/open_and_acknowledged_alerts_tool.test.ts b/x-pack/plugins/security_solution/server/assistant/tools/open_and_acknowledged_alerts/open_and_acknowledged_alerts_tool.test.ts
index 2b134dfd86335..09bae1639f1b1 100644
--- a/x-pack/plugins/security_solution/server/assistant/tools/open_and_acknowledged_alerts/open_and_acknowledged_alerts_tool.test.ts
+++ b/x-pack/plugins/security_solution/server/assistant/tools/open_and_acknowledged_alerts/open_and_acknowledged_alerts_tool.test.ts
@@ -32,14 +32,12 @@ describe('OpenAndAcknowledgedAlertsTool', () => {
   } as unknown as KibanaRequest<unknown, unknown, ExecuteConnectorRequestBody>;
   const isEnabledKnowledgeBase = true;
   const chain = {} as unknown as RetrievalQAChain;
-  const modelExists = true;
   const logger = loggerMock.create();
   const rest = {
     isEnabledKnowledgeBase,
     esClient,
     chain,
     logger,
-    modelExists,
   };
 
   const anonymizationFields = [