Adding MCP call specification

Signed-off-by: amin-nikanjam <[email protected]>

Author: amin-nikanjam

schema/workflow.yaml

@@ -473,6 +473,41 @@ $defs:
                   description: The parameters object to send with the A2A method.
               required: [ method ]
               unevaluatedProperties: false
+      - title: CallMCP
+        description: Defines the MCP call to perform.
+        type: object
+        unevaluatedProperties: false
+        required: [ call, with ]
+        allOf:
+        - $ref: '#/$defs/taskBase'
+        - properties:
+            call:
+              type: string
+              const: mcp
+            with:
+              type: object
+              title: MCPArguments
+              description: The MCP call arguments.
+              properties:
+                server:
+                  title: MCPServer
+                  description: The MCP server endpoint to send the request to.
+                  $ref: '#/$defs/endpoint'
+                method:
+                  type: string
+                  title: WithMCPMethod
+                  description: The MCP method to send.
+                  enum: [ 'initialize, 'notifications/initialized', 'prompts/list', 'prompts/get', 'notifications/prompts/list_changed', 'resources/list', 'resources/read', 'resources/templates/list', 'notifications/resources/list_changed', 'tools/list', 'tools/call', 'notifications/tools/list_changed', 'logging/setLevel', 'notifications/message' ]
+                parameters:
+                  oneOf:
+                    - type: object
+                      minProperties: 1
+                      additionalProperties: true
+                    - type: string
+                  title: WithMCPParameters
+                  description: The parameters object to send with the MCP method.
+              required: [ method, server ]
+              unevaluatedProperties: false              
       - title: CallFunction
         description: Defines the function call to perform.
         type: object
@@ -1823,4 +1858,4 @@ $defs:
       export:
         $ref: '#/$defs/export'
         title: SubscriptionIteratorExport
-        description: An object, if any, used to customize the content of the workflow context.
+        description: An object, if any, used to customize the content of the workflow context.