ZV-2026-0983 · 2026-09-11 · mcp.comos-federation.com
mcp.comos-federation.com: Tool federation_catalog_search_grouped_multi was removed.
breaking
What changed
Tool federation_catalog_search_grouped_multi was removed. Tool federation_catalog_search_multi was removed. Tool federation_catalog_version was removed. Tool federation_choice_compare was removed. Tool federation_choice_get was removed. Tool federation_node_act_complete was removed. Tool federation_node_catalog_sync was removed. Tool federation_node_drain_queue was removed. Tool federation_node_report_in was removed. Tool federation_node_tenant_reserve was removed. Tool introspection_corpus_compare was removed. Tool introspection_corpus_probe_disagreement was removed. Tool introspection_corpus_probe_scope was removed. Tool introspection_corpus_query was removed. Tool introspection_system_change_graph was removed. Tool introspection_system_change_reach was removed. Tool introspection_system_climb_history was removed. Tool introspection_system_co_decisions was removed. Tool introspection_system_confidence was removed. Tool introspection_system_coverage_gaps was removed. Tool introspection_system_diff was removed. Tool introspection_system_list_nodes was removed. Tool introspection_system_list_repos was removed. Tool introspection_system_probe was removed. Tool moltbook_read was removed.
What to do
If your agents call mcp.comos-federation.com, pin the new snapshot, patch the affected call sites, and let a green contract check confirm the fix. If you don't use the changed tools, nothing is required, but the rest of the ecosystem just learned about it at the same moment you did.
The redline
− federation_catalog_search_grouped_multi Tool federation_catalog_search_grouped_multi was removed. − federation_catalog_search_multi Tool federation_catalog_search_multi was removed. − federation_catalog_version Tool federation_catalog_version was removed. − federation_choice_compare Tool federation_choice_compare was removed. − federation_choice_get Tool federation_choice_get was removed. − federation_node_act_complete Tool federation_node_act_complete was removed. − federation_node_catalog_sync Tool federation_node_catalog_sync was removed. − federation_node_drain_queue Tool federation_node_drain_queue was removed. − federation_node_report_in Tool federation_node_report_in was removed. − federation_node_tenant_reserve Tool federation_node_tenant_reserve was removed. − introspection_corpus_compare Tool introspection_corpus_compare was removed. − introspection_corpus_probe_disagreement Tool introspection_corpus_probe_disagreement was removed. − introspection_corpus_probe_scope Tool introspection_corpus_probe_scope was removed. − introspection_corpus_query Tool introspection_corpus_query was removed. − introspection_system_change_graph Tool introspection_system_change_graph was removed. − introspection_system_change_reach Tool introspection_system_change_reach was removed. − introspection_system_climb_history Tool introspection_system_climb_history was removed. − introspection_system_co_decisions Tool introspection_system_co_decisions was removed. − introspection_system_confidence Tool introspection_system_confidence was removed. − introspection_system_coverage_gaps Tool introspection_system_coverage_gaps was removed. − introspection_system_diff Tool introspection_system_diff was removed. − introspection_system_list_nodes Tool introspection_system_list_nodes was removed. − introspection_system_list_repos Tool introspection_system_list_repos was removed. − introspection_system_probe Tool introspection_system_probe was removed. − moltbook_read Tool moltbook_read was removed. − Get usage instructions for the MCP federation. CALL THIS FIRST to understand how to use to… + Get usage instructions for the MCP federation. CALL THIS FIRST to understand how to use to… federation_help + tool_defs Optional field tool_defs was added to federation_help; may shift model behaviour. − Invoke a BRANCHED platform tool through the root surface — for clients whose runtime only … + Invoke any served tool through the root surface — for clients whose runtime only calls too… federation_act − tenant_id Field tenant_id on federation_act is no longer required.