When connecting to an MCP server that has a large number of tools, only a subset of them show up. There's no error — they just don't appear in the list.
This happens because listTools sends a single request and stops, but some servers paginate their response using nextCursor (as allowed by the MCP spec (https://modelcontextprotocol.info/specification/draft/server/utilities/pagination/)). Any tools on page 2+ are silently dropped.