# compare_yields READ-ONLY — return a ranked table of supply-side yield opportunities for a given asset across every integrated lending / staking protocol. v1 covers Aave V3 (5 EVM chains), Compound V3 (5 EVM chains, multi-market per chain), and Lido stETH (Ethereum only). Other protocols (Morpho Blue, MarginFi, Kamino, Marinade, Jito, EigenLayer, Solana native-stake) appear in the response's unavailable[] list with a coverage-gap reason — they need their wallet-less market readers split out from existing wallet-aware readers; tracked as follow-up work. Output per row: protocol, chain, market (free-form: 'cUSDCv3' for Compound, the asset symbol for Aave, 'stETH' for Lido), supplyApr (current, fractional 0.0481 = 4.81%), supplyApy (continuously-compounded), tvl (USD, may be null when the upstream doesn't expose it cheaply), riskScore (0-100 from get_protocol_risk_score, may be null), notes (pause flags, frozen reserves, etc.). Rows are sorted by supplyApr descending; null APR sinks. Filters: chains (default = all EVM mainnets + Solana); minTvlUsd (rows with tvl: null are NOT filtered — no data ≠ tiny market); riskCeiling (only show protocols at LEAST this safe; rows with riskScore: null are NOT filtered). Empty result returns emptyResultReason explaining whether nothing matched at all vs. everything filtered out. AGENT BEHAVIOR: this tool surfaces data; it does NOT pick. Surface the comparison verbatim. Do NOT pick a 'best' option for the user — they decide. The plan's positioning is explicit: 'Here are current supply rates' is right; 'I recommend depositing in X' is OUT. Agent View of the PolicyLayer registry record for `compare_yields`. HTML page: https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/compare-yields ## Facts - Tool: `compare_yields` - Server: VaultPilot MCP (`vaultpilot-mcp`) — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp.md - Install: `npx -y vaultpilot-mcp` - Homepage: https://github.com/szhygulin/vaultpilot-mcp - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 4 (1 required) - Recommended policy verdict: Allowed ## Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `asset` | string | yes | Asset to compare supply yields for. 'stables' is a meta-asset that expands to USDC + USDT (the two stables every adapter knows). 'ETH' resolves to WETH on EVM l | | `chains` | array | no | Restrict to specific chains. Default: all integrated EVM chains + Solana. BTC / LTC have no integrated lending so they return empty — pass them only if you spec | | `minTvlUsd` | number | no | Minimum supply-side TVL in USD; rows below the bar are filtered. Rows where TVL is unknown (the upstream didn't expose it) are NOT filtered — surfaced honestly | | `riskCeiling` | number | no | Minimum protocol risk score (0-100; higher = safer per `get_protocol_risk_score`). Despite the name 'ceiling', the comparison is `score >= ceiling` — only show | Parameters from the server's own tool schema. ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "compare_yields", "arguments": { "asset": "" } } } ``` ## Why compare_yields is rated Low This tool retrieves and queries yield data across DeFi protocols without creating, modifying, deleting, or executing any transactions. It has no side effects and presents read-only information to help users compare investment opportunities. The low severity reflects that misuse would at worst provide misleading yield comparisons, not enable financial loss or fund movement. From the tool's own definition: "Tool description explicitly states 'READ-ONLY' and describes returning a 'ranked table of supply-side yield opportunities' with no modification or execution capabilities. The output is informational data about yields across protocols." ## Use case AI agents call compare_yields to retrieve information from VaultPilot MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches VaultPilot MCP: ```json { "version": "1", "default": "deny", "tools": { "compare_yields": {} } } ``` ## Other tools on VaultPilot MCP (188) - `prepare_btc_lifi_swap` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-btc-lifi-swap.md - `prepare_btc_rbf_bump` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-btc-rbf-bump.md - `prepare_jito_stake` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-jito-stake.md - `prepare_marginfi_init` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-marginfi-init.md - `prepare_solana_nonce_close` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-solana-nonce-close.md - `prepare_sunswap_swap` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-sunswap-swap.md - `prepare_uniswap_v3_burn` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-uniswap-v3-burn.md - `prepare_uniswap_v3_mint` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-uniswap-v3-mint.md - `remove_contact` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/remove-contact.md - `unregister_btc_multisig_wallet` — Destructive — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/unregister-btc-multisig-wallet.md - `combine_btc_psbts` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/combine-btc-psbts.md - `pair_ledger_btc` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/pair-ledger-btc.md - `prepare_aave_repay` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-aave-repay.md - `prepare_btc_multisig_send` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-btc-multisig-send.md - `prepare_compound_repay` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-compound-repay.md - `prepare_compound_supply` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-compound-supply.md - `prepare_curve_swap` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-curve-swap.md - `prepare_custom_call` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-custom-call.md - `prepare_kamino_init_user` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-kamino-init-user.md - `prepare_kamino_supply` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-kamino-supply.md - `prepare_lido_unstake` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-lido-unstake.md - `prepare_lido_unwrap` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-lido-unwrap.md - `prepare_lido_wrap` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-lido-wrap.md - `prepare_native_stake_deactivate` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-native-stake-deactivate.md - `prepare_native_stake_delegate` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-native-stake-delegate.md - `prepare_rocketpool_unstake` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-rocketpool-unstake.md - `prepare_safe_tx_execute` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-safe-tx-execute.md - `prepare_solana_lifi_swap` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-solana-lifi-swap.md - `prepare_solana_nonce_init` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-solana-nonce-init.md - `prepare_solana_swap` — Execute — https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp/prepare-solana-swap.md - …and 158 more: https://policylayer.com/tools/io-github-szhygulin-vaultpilot-mcp.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-szhygulin-vaultpilot-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-szhygulin-vaultpilot-mcp