.

Signed-off-by: He-Pin <[email protected]>

Author: He-Pin

mcp-core/src/main/java/io/modelcontextprotocol/spec/McpSchema.java

@@ -1668,6 +1668,17 @@ private static JsonSchema parseSchema(McpJsonMapper jsonMapper, String schema) {
 		}
 	}
 
+    /**
+     * Metadata about a task.
+     * */
+    @JsonInclude(JsonInclude.Include.NON_ABSENT)
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public record TaskMetaData(@JsonProperty("ttl") long ttl,
+                               @JsonProperty("extensions") Object extensions,
+                               @JsonProperty("bizContext") Object bizContext) {
+
+    }
+
 	/**
 	 * Used by the client to call a tool provided by the server.
 	 *
@@ -1683,14 +1694,15 @@ private static JsonSchema parseSchema(McpJsonMapper jsonMapper, String schema) {
 	public record CallToolRequest( // @formatter:off
 		@JsonProperty("name") String name,
 		@JsonProperty("arguments") Map<String, Object> arguments,
+        @JsonProperty("task") TaskMetaData task,
 		@JsonProperty("_meta") Map<String, Object> meta) implements Request { // @formatter:on
 
 		public CallToolRequest(McpJsonMapper jsonMapper, String name, String jsonArguments) {
-			this(name, parseJsonArguments(jsonMapper, jsonArguments), null);
+			this(name, parseJsonArguments(jsonMapper, jsonArguments), null, null);
 		}
 
 		public CallToolRequest(String name, Map<String, Object> arguments) {
-			this(name, arguments, null);
+			this(name, arguments, null, null);
 		}
 
 		private static Map<String, Object> parseJsonArguments(McpJsonMapper jsonMapper, String jsonArguments) {
@@ -1712,6 +1724,8 @@ public static class Builder {
 
 			private Map<String, Object> arguments;
 
+            private TaskMetaData task;
+
 			private Map<String, Object> meta;
 
 			public Builder name(String name) {
@@ -1742,9 +1756,14 @@ public Builder progressToken(Object progressToken) {
 				return this;
 			}
 
+            public Builder task(TaskMetaData task) {
+                this.task = task;
+                return this;
+            }
+
 			public CallToolRequest build() {
 				Assert.hasText(name, "name must not be empty");
-				return new CallToolRequest(name, arguments, meta);
+				return new CallToolRequest(name, arguments, task, meta);
 			}
 
 		}