diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1065fe451..3cb728001 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,6 +51,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added `GET`, `POST`, `PUT`, `DELETE /_plugins/_ml/controllers/{model_id}` ([#779](https://github.com/opensearch-project/opensearch-api-specification/pull/779))
 - Added `GET /_plugins/_ml/profile`, `GET /_plugins/_ml/profile/models`, `models/{model_id}`, `tasks`, `tasks/{task_id}` ([#787](https://github.com/opensearch-project/opensearch-api-specification/pull/787))
 - Added `GET /_plugins/_ml/stats/`, `stats/{stat}`, `{nodeId}/stats/`, `{nodeId}/stats/{stat}` ([#794](https://github.com/opensearch-project/opensearch-api-specification/pull/794))
+- Added `GET`, `POST /_plugins/_ml/tasks/_search`, `GET /_plugins/_ml/tools`, `tools/{tool_name}` ([#797](https://github.com/opensearch-project/opensearch-api-specification/pull/797))
 
 ### Removed
 - Removed unsupported `_common.mapping:SourceField`'s `mode` field and associated `_common.mapping:SourceFieldMode` enum ([#652](https://github.com/opensearch-project/opensearch-api-specification/pull/652))
diff --git a/spec/namespaces/ml.yaml b/spec/namespaces/ml.yaml
index ca4d8be26..a5775127b 100644
--- a/spec/namespaces/ml.yaml
+++ b/spec/namespaces/ml.yaml
@@ -270,6 +270,7 @@ paths:
     get:
       operationId: ml.get_task.0
       x-operation-group: ml.get_task
+      x-version-added: '1.3'
       description: Retrieves a task.
       parameters:
         - $ref: '#/components/parameters/ml.get_task::path.task_id'
@@ -279,12 +280,34 @@ paths:
     delete:
       operationId: ml.delete_task.0
       x-operation-group: ml.delete_task
+      x-version-added: '1.3'
       description: Deletes a task.
       parameters:
         - $ref: '#/components/parameters/ml.delete_task::path.task_id'
       responses:
         '200':
           $ref: '#/components/responses/ml.delete_task@200'
+  /_plugins/_ml/tasks/_search:
+    get:
+      operationId: ml.search_tasks.0
+      x-operation-group: ml.search_tasks
+      x-version-added: '1.3'
+      description: Searches for tasks.
+      requestBody:
+        $ref: '#/components/requestBodies/ml.search_tasks'
+      responses:
+        '200':
+          $ref: '#/components/responses/ml.search_tasks@200'
+    post:
+      operationId: ml.search_tasks.1
+      x-operation-group: ml.search_tasks
+      x-version-added: '1.3'
+      description: Searches for tasks.
+      requestBody:
+        $ref: '#/components/requestBodies/ml.search_tasks'
+      responses:
+        '200':
+          $ref: '#/components/responses/ml.search_tasks@200'
   /_plugins/_ml/models/_search:
     get:
       operationId: ml.search_models.0
@@ -735,6 +758,26 @@ paths:
       responses:
         '200':
           $ref: '#/components/responses/ml.get_stats@200'
+  /_plugins/_ml/tools:
+    get:
+      operationId: ml.get_tools.0
+      x-operation-group: ml.get_tools
+      x-version-added: '2.12'
+      description: Get tools.
+      responses:
+        '200':
+          $ref: '#/components/responses/ml.get_tools@200'
+  /_plugins/_ml/tools/{tool_name}:
+    get:
+      operationId: ml.get_tools.1
+      x-operation-group: ml.get_tools
+      x-version-added: '2.12'
+      description: Get tools.
+      parameters:
+        - $ref: '#/components/parameters/ml.get_tools::path.tool_name'
+      responses:
+        '200':
+          $ref: '#/components/responses/ml.get_tools@200'
 components:
   requestBodies:
     ml.register_model_group:
@@ -1038,6 +1081,23 @@ components:
                 description: The text documents.
             required:
               - text_docs
+    ml.search_tasks:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              query:
+                $ref: '../schemas/ml._common.yaml#/components/schemas/Query'
+              size:
+                type: integer
+                format: int64
+                description: The number of tasks to return.
+              sort:
+                type: array
+                items:
+                  $ref: '../schemas/ml._common.yaml#/components/schemas/Sort'
+                description: The sort order.
     ml.predict:
       content:
         application/json:
@@ -1520,6 +1580,11 @@ components:
         application/json:
           schema:
             $ref: '../schemas/ml._common.yaml#/components/schemas/Task'
+    ml.search_tasks@200:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/ml._common.yaml#/components/schemas/SearchTasksResponse'
     ml.search_models@200:
       content:
         application/json:
@@ -1741,6 +1806,15 @@ components:
         application/json:
           schema:
             $ref: '../schemas/ml._common.yaml#/components/schemas/GetStatsResponse'
+    ml.get_tools@200:
+      content:
+        application/json:
+          schema:
+            oneOf:
+              - type: array
+                items:
+                  $ref: '../schemas/ml._common.yaml#/components/schemas/GetToolsResponse'
+              - $ref: '../schemas/ml._common.yaml#/components/schemas/GetToolsResponse'
   parameters:
     ml.get_all_memories::query.max_results:
       name: max_results
@@ -2047,4 +2121,28 @@ components:
       in: path
       required: true
       schema:
-        type: string
\ No newline at end of file
+        type: string
+    ml.get_tools::path.tool_name:
+      name: tool_name
+      in: path
+      required: true
+      schema:
+        type: string
+        enum:
+          - AgentTool
+          - CatIndexTool
+          - ConnectorTool
+          - CreateAnomalyDetectorTool
+          - IndexMappingTool
+          - LogPatternTool
+          - MLModelTool
+          - NeuralSparseSearchTool
+          - PPLTool
+          - RAGTool
+          - SearchAlertsTool
+          - SearchAnomalyDetectorsTool
+          - SearchAnomalyResultsTool
+          - SearchIndexTool
+          - SearchMonitorsTool
+          - VectorDBTool
+          - VisualizationTool
\ No newline at end of file
diff --git a/spec/schemas/ml._common.yaml b/spec/schemas/ml._common.yaml
index 97bef40b4..edc648e60 100644
--- a/spec/schemas/ml._common.yaml
+++ b/spec/schemas/ml._common.yaml
@@ -6,6 +6,8 @@ info:
 paths: {}
 components:
   schemas:
+    SearchTasksResponse:
+      $ref: '#/components/schemas/SearchResponse'
     SearchModelsResponse:
       $ref: '#/components/schemas/SearchResponse'
     SearchResponse:
@@ -144,6 +146,10 @@ components:
           type: integer
           format: int64
           description: The last updated time.
+        last_update_time:
+          type: integer
+          format: int64
+          description: The last update time.
         last_registered_time:
           type: integer
           format: int64
@@ -211,8 +217,11 @@ components:
           format: date-time
           description: The updated time.
         create_time:
-          type: string
-          format: date-time
+          anyOf:
+            - type: string
+              format: date-time
+            - type: integer
+              format: int64
           description: The create time.
         application_type:
           type: ['null', string]
@@ -242,6 +251,42 @@ components:
         prompt_template:
           type: ['null', string]
           description: The prompt template.
+        is_async:
+          type: boolean
+          description: Whether the task is asynchronous.
+        function_name:
+          $ref: '#/components/schemas/FunctionName'
+        input_type:
+          type: string
+          description: The input type.
+          enum:
+            - DATA_FRAME
+            - QUESTION_ANSWERING
+            - REMOTE
+            - SEARCH_QUERY
+            - TEXT_DOCS
+            - TEXT_SIMILARITY
+        worker_node:
+          type: array
+          items:
+            $ref: '_common.yaml#/components/schemas/NodeIds'
+        task_type:
+          type: string
+          description: Task type.
+          enum:
+            - BATCH_INGEST
+            - BATCH_PREDICTION
+            - DEPLOY_MODEL
+            - EXECUTION
+            - PREDICTION
+            - REGISTER_MODEL
+            - TRAINING
+            - TRAINING_AND_PREDICTION
+        state:
+          $ref: '#/components/schemas/Status'
+        error:
+          type: string
+          description: The error message.
     ModelConfig:
       type: object
       properties:
@@ -483,6 +528,8 @@ components:
           type: array
           items:
             $ref: '_common.yaml#/components/schemas/Id'
+        function_name:
+          $ref: '#/components/schemas/FunctionName'
         model_id:
           $ref: '_common.yaml#/components/schemas/Name'
         name:
@@ -494,28 +541,30 @@ components:
       description: The algorithm.
       properties:
         value:
-          type: string
-          description: The function name.
-          enum:
-            - AD_LIBSVM
-            - AGENT
-            - ANOMALY_LOCALIZATION
-            - BATCH_RCF
-            - CONNECTOR
-            - FIT_RCF
-            - KMEANS
-            - LINEAR_REGRESSION
-            - LOCAL_SAMPLE_CALCULATOR
-            - LOGISTIC_REGRESSION
-            - METRICS_CORRELATION
-            - QUESTION_ANSWERING
-            - RCF_SUMMARIZE
-            - REMOTE
-            - SAMPLE_ALGO
-            - SPARSE_ENCODING
-            - SPARSE_TOKENIZE
-            - TEXT_EMBEDDING
-            - TEXT_SIMILARITY
+          $ref: '#/components/schemas/FunctionName'
+    FunctionName:
+      type: string
+      description: The function name.
+      enum:
+        - AD_LIBSVM
+        - AGENT
+        - ANOMALY_LOCALIZATION
+        - BATCH_RCF
+        - CONNECTOR
+        - FIT_RCF
+        - KMEANS
+        - LINEAR_REGRESSION
+        - LOCAL_SAMPLE_CALCULATOR
+        - LOGISTIC_REGRESSION
+        - METRICS_CORRELATION
+        - QUESTION_ANSWERING
+        - RCF_SUMMARIZE
+        - REMOTE
+        - SAMPLE_ALGO
+        - SPARSE_ENCODING
+        - SPARSE_TOKENIZE
+        - TEXT_EMBEDDING
+        - TEXT_SIMILARITY
     OwnerNameKeyword:
       type: object
       description: The owner name keyword.
@@ -919,10 +968,16 @@ components:
           type: string
           description: Task type.
           enum:
+            - BATCH_INGEST
+            - BATCH_PREDICTION
             - DEPLOY_MODEL
+            - EXECUTION
+            - PREDICTION
             - REGISTER_MODEL
+            - TRAINING
+            - TRAINING_AND_PREDICTION
         function_name:
-          type: string
+          $ref: '#/components/schemas/FunctionName'
         worker_node:
           type: array
           items:
@@ -1262,15 +1317,17 @@ components:
           format: int64
           description: The estimated memory size in GPU.
         deploy:
-          $ref: '#/components/schemas/Deploy'
+          $ref: '#/components/schemas/ModelStats'
         register:
-          $ref: '#/components/schemas/Register'
+          $ref: '#/components/schemas/ModelStats'
         undeploy:
-          $ref: '#/components/schemas/Undeploy'
+          $ref: '#/components/schemas/ModelStats'
         predict:
-          $ref: '#/components/schemas/Predict'
+          $ref: '#/components/schemas/ModelStats'
         train:
-          $ref: '#/components/schemas/Train'
+          $ref: '#/components/schemas/ModelStats'
+        train_predict:
+          $ref: '#/components/schemas/ModelStats'
     PredictRequestStats:
       type: object
       properties:
@@ -1402,15 +1459,17 @@ components:
       type: object
       properties:
         deploy:
-          $ref: '#/components/schemas/Deploy'
+          $ref: '#/components/schemas/ModelStats'
         register:
-          $ref: '#/components/schemas/Register'
+          $ref: '#/components/schemas/ModelStats'
         undeploy:
-          $ref: '#/components/schemas/Undeploy'
+          $ref: '#/components/schemas/ModelStats'
         predict:
-          $ref: '#/components/schemas/Predict'
+          $ref: '#/components/schemas/ModelStats'
         train:
-          $ref: '#/components/schemas/Train'
+          $ref: '#/components/schemas/ModelStats'
+        train_predict:
+          $ref: '#/components/schemas/ModelStats'
     ModelStats:
       type: object
       properties:
@@ -1426,13 +1485,25 @@ components:
           type: integer
           format: int64
           description: The executing task count.
-    Deploy:
-      $ref: '#/components/schemas/ModelStats'
-    Register:
-      $ref: '#/components/schemas/ModelStats'
-    Undeploy:
-      $ref: '#/components/schemas/ModelStats'
-    Predict:
-      $ref: '#/components/schemas/ModelStats'
-    Train:
-      $ref: '#/components/schemas/ModelStats'
+    Aggregation:
+      type: object
+      properties:
+        sum:
+          $ref: '#/components/schemas/Aggregation'
+        field:
+          type: string
+          description: The field name.
+      additionalProperties: true
+    GetToolsResponse:
+      type: object
+      properties:
+        name:
+          $ref: '_common.yaml#/components/schemas/Name'
+        description:
+          type: string
+          description: The tool description.
+        type:
+          type: string
+          description: The tool type.
+        version:
+          $ref: '_common.yaml#/components/schemas/VersionString'
\ No newline at end of file
diff --git a/tests/plugins/ml/ml/tasks/search.yaml b/tests/plugins/ml/ml/tasks/search.yaml
new file mode 100644
index 000000000..21b0fba4a
--- /dev/null
+++ b/tests/plugins/ml/ml/tasks/search.yaml
@@ -0,0 +1,58 @@
+$schema: ../../../../../json_schemas/test_story.schema.yaml
+
+description: Test the search of tasks.
+version: '>= 2.7'
+prologues:
+  - path: /_cluster/settings
+    method: PUT
+    request:
+      payload:
+        persistent:
+          plugins.ml_commons.jvm_heap_memory_threshold: 100
+  - path: /_plugins/_ml/models/_register
+    id: register_model
+    method: POST
+    request:
+      payload:
+        name: test_kmeans_model
+        function_name: KMEANS
+        model_format: TORCH_SCRIPT
+    output:
+      task_id: payload.task_id
+epilogues:
+  - path: /_plugins/_ml/tasks/{task_id}
+    method: DELETE
+    status: [200, 404]
+    parameters:
+      task_id: ${register_model.task_id}
+chapters:
+  - synopsis: Search task.
+    path: /_plugins/_ml/tasks/_search
+    method: GET
+    request:
+      payload:
+        query:
+          match_all: {}
+        size: 1000
+    response:
+      status: 200
+      payload:
+        hits:
+          hits:
+            - _score: 1
+  - synopsis: Search task with function name.
+    path: /_plugins/_ml/tasks/_search
+    method: POST
+    request:
+      payload:
+        query:
+          bool:
+            filter:
+              - term:
+                  function_name: KMEANS
+    response:
+      status: 200
+      payload:
+        hits:
+          hits:
+            - _score: 0
\ No newline at end of file
diff --git a/tests/plugins/ml/ml/tools.yaml b/tests/plugins/ml/ml/tools.yaml
new file mode 100644
index 000000000..c09abb42b
--- /dev/null
+++ b/tests/plugins/ml/ml/tools.yaml
@@ -0,0 +1,17 @@
+$schema: ../../../../json_schemas/test_story.schema.yaml
+
+description: Test the retrieval of tools.
+version: '>= 2.12'
+chapters:
+  - synopsis: Get tools.
+    path: /_plugins/_ml/tools
+    method: GET
+    response:
+      status: 200
+  - synopsis: Get tools by tool name.
+    path: /_plugins/_ml/tools/{tool_name}
+    method: GET
+    parameters:
+      tool_name: ConnectorTool
+    response:
+      status: 200
\ No newline at end of file