Merge pull request #536 from GoogleCloudPlatform/fix-mcp-2-pin

fix(deps): pin mcp>=1.8,<2

Author: prernakakkar-google

pyproject.toml

@@ -59,7 +59,11 @@ dependencies = [
     "dbt-bigquery",
     "dbt-postgres",
     "a2a-sdk>=1.0.3",
-    "mcp",
+    # 2.0.0 renamed mcp.client.streamable_http.streamablehttp_client to
+    # streamable_http_client, breaking generators/models/mcp_tools.py. The
+    # 1.8 floor is where streamablehttp_client was introduced. Lift once the
+    # call site is migrated to the 2.x name.
+    "mcp>=1.8,<2",
     # 26.2.0 turned a long-standing deprecation into a hard error
     # (mutating SSL.Context after use), breaking google-auth's mTLS path
     # (urllib3.contrib.pyopenssl.inject_into_urllib3). Lift when google-auth