GTM API / Search antidetect browser proxies

List antidetect browser proxies (platform-wide pool) with filters, sorting and cursor pagination. Live proxies by default (filter {"deleted_at": {"is_null": true}}). Credentials (ip / port / username / password) are masked to null on this public read surface. Contract: - MCP tool search_antidetect_browser_proxies, registry package mcp.linkedin/antidetect_browser_proxies, mount linkedin.browsers. - Operation search, response envelope search. - Flags: read only.