ZV-2026-1991 · 2026-10-09 · mcphost.dev
mcphost.dev: kind on host.tool_publish narrowed to a closed enum (chain, echo, http, python, wasm, event, events, webhook, webhooks, inbound, trigger, cron, schedule, scheduled, doc, docs, document, d
breaking
What changed
kind on host.tool_publish narrowed to a closed enum (chain, echo, http, python, wasm, event, events, webhook, webhooks, inbound, trigger, cron, schedule, scheduled, doc, docs, document, documents, message, messages, inbox, msg, database, db, table, tables, csv, sql, schedules, uptime, probe, probes, memory, memories); previously valid values may now be rejected.
What to do
If your agents call mcphost.dev, 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
− open + enum[chain,echo,http,python,wasm,event,events,webhook,webhooks,inbound,trigger,cron,schedu… host.tool_publish − kind Field kind on host.quickstart is no longer required. − Publish a tool of a registered kind (chain, echo, http, python, wasm) under this tenant's … + Publish a tool of a registered kind (e.g. python, http or echo; the kind argument's enum l… host.tool_publish