Creates a new account by writing READ-ONLY credentials to the OS keychain. Use when the user asks: 'add a Bybit account', 'connect Binance', 'connect my MetaMask wallet', 'set up Polymarket', 'connect my Solana wallet', 'track my Hyperliquid', 'add my Hyperliquid wallet', 'add new exchange'. BEHAVIOR CONTRACT FOR YOU (the LLM): - After this tool succeeds, confirm ONLY the account label and account_id back to the user. - NEVER echo, log, paraphrase, or repeat the credential values (apiKey, apiSecret, etherscanApiKey) in your response. - If the user pastes credentials inline in chat, suggest they use the Settings UI (render_settings tool) form instead — the form keeps secrets out of the conversation transcript. Credentials are validated against the upstream API before they're persisted; if validation fails, nothing is written. Storage: OS keychain (macOS Keychain / Linux Secret Service / Windows Credential Vault) via @napi-rs/keyring. Same path as the CLI setup flow. All six connectors use READ-ONLY credentials by design (Bybit 'Read' only, Binance 'Enable Reading' only, Etherscan is a public-data rate-limit token, Polymarket proxy wallet is already public, Solana/Hyperliquid addresses are public on-chain identifiers — Hyperliquid needs no key or signature at all). Inputs (one of bybit / binance / metamask / polymarket / solana / hyperliquid required): - connector: 'bybit' | 'binance' | 'metamask' | 'polymarket' | 'solana' | 'hyperliquid' - bybit: { apiKey, apiSecret, accountType: 'UNIFIED'|'CONTRACT'|'SPOT'|'FUND' (primary, also the account ID), accountTypes?: array of additional types to fan out across (e.g. ['FUND'] alongside UNIFIED so funding-wallet balances are tracked too) } - binance: { apiKey, apiSecret, includeFutures (optional bool, default false), recvWindow (optional ms) } - metamask: { address, etherscanApiKey, chainIds (number[]), trackCommonTokens (bool), hasEtherscanPro (bool) } - polymarket: { proxyWallet (0x...), sizeThreshold (default 0.01) } - solana: { address (base58), rpcUrl (optional premium RPC), dustThresholdUsd (optional, default 0.5) } - hyperliquid: { address (0x... EVM address you trade from), dustThresholdUsd (optional, default 0.5). No API key — public address only. Tracks perp account equity + open positions + spot balances. }