A tool server or connection is not working
Reconnect, check the allowlist, and remember that a tool reporting an error is treated as a real failure rather than something to retry blindly.
In this article (5)
The server shows as needing attention
Press Reconnect on it in Settings → MCP servers. Some providers invalidate an authorisation (password change, revoked app, expired grant) and only a fresh sign-in fixes it — FlowArray distinguishes that from a temporary blip and only asks you to reconnect when it genuinely needs you.
Automatic renewal runs in the background, including for connections that have been idle, and each server has its own on/off switch for it.
No tools appear
- FlowArray discovers tools from the server, so an empty list usually means the connection is not really authorised yet, or the account you signed in with has access to nothing.
- Check the URL is the server's MCP endpoint. Some products publish a different path for it.
- A server that requires a token needs it entered on Add server.
A step says the tool failed
A tool that reports an error is not retried automatically, because it may have had side effects — a half-repeated write is worse than a reported failure. Read the message on the run: it is the server's own.
Turn on per-step retries only for tools you know are safe to repeat.
An agent did not use the tool I expected
- It can only use what you ticked. The allowlist is absolute.
- Read-only by default: a tool that changes things needs the separate "allow changes" tick.
- It may have hit a cap (5 tool calls, 4 turns by default) and answered with what it had. That is a clean stop, not a crash.
- Open Steps on the item for the full transcript — every call, its arguments and its result. That usually shows immediately whether it tried and failed or never tried.
- An agent step must run on a Claude (Anthropic) pool.
See agents and connecting tool servers.
Claude cannot see my flows
That is the other direction — FlowArray as a tool server. Re-run /mcp → Connect and sign in; check Settings → MCP access for what currently has access, and remember a revoked token cuts off immediately.