Merge pull request #336 from TomorJM:google_dev_mcp_sse_param

PiperOrigin-RevId: 796439184

Author: copybara-github

core/src/main/java/com/google/adk/tools/mcp/DefaultMcpTransportBuilder.java

@@ -21,7 +21,8 @@ public McpClientTransport build(Object connectionParams) {
       return new StdioClientTransport(serverParameters);
     } else if (connectionParams instanceof SseServerParameters sseServerParams) {
       return HttpClientSseClientTransport.builder(sseServerParams.url())
-          .sseEndpoint("sse")
+          .sseEndpoint(
+              sseServerParams.sseEndpoint() == null ? "sse" : sseServerParams.sseEndpoint())
           .customizeRequest(
               builder ->
                   Optional.ofNullable(sseServerParams.headers())

core/src/main/java/com/google/adk/tools/mcp/SseServerParameters.java

@@ -29,6 +29,10 @@ public abstract class SseServerParameters {
   /** The URL of the SSE server. */
   public abstract String url();
 
+  /** The endpoint to connect to on the SSE server. */
+  @Nullable
+  public abstract String sseEndpoint();
+
   /** Optional headers to include in the SSE connection request. */
   @Nullable
   public abstract ImmutableMap<String, Object> headers();
@@ -52,6 +56,9 @@ public abstract static class Builder {
     /** Sets the URL of the SSE server. */
     public abstract Builder url(String url);
 
+    /** Sets the endpoint to connect to on the SSE server. */
+    public abstract Builder sseEndpoint(String sseEndpoint);
+
     /** Sets the headers for the SSE connection request. */
     public abstract Builder headers(@Nullable Map<String, Object> headers);