# get_energy_rental_rate

Get the current energy rental rate for a given TRX amount.

Agent View of the PolicyLayer registry record for `get_energy_rental_rate`. HTML page: https://policylayer.com/tools/justlend-mcp-server-justlend/get-energy-rental-rate

## Facts

- Tool: `get_energy_rental_rate`
- Server: Justlend (`justlend/mcp-server-justlend`) — https://policylayer.com/tools/justlend-mcp-server-justlend.md
- Homepage: https://github.com/justlend/mcp-server-justlend
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_energy_rental_rate",
    "arguments": {}
  }
}
```

## Why get_energy_rental_rate is rated Low

This tool fetches real-time pricing information from the TRON chain for energy rental rates. It performs a read-only query with no side effects, no code execution beyond data retrieval, and no financial transactions. The worst case misuse is providing an AI agent with stale or irrelevant rate information for decision-making, but the tool itself cannot authorize payments, modify contracts, or lock funds.

From the tool's own definition: "Tool name 'get_energy_rental_rate' and description 'Get the current energy rental rate' indicate a query operation that retrieves data about pricing without modifying state or triggering transactions."

## Use case

AI agents call get_energy_rental_rate to retrieve information from Justlend 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 Justlend:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_energy_rental_rate": {}
  }
}
```

## Other tools on Justlend (103)

- `return_energy_rental` — Destructive — https://policylayer.com/tools/justlend-mcp-server-justlend/return-energy-rental.md
- `buy_energy_direct` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/buy-energy-direct.md
- `claim_rewards` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/claim-rewards.md
- `claim_strx_rewards` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/claim-strx-rewards.md
- `deposit_jst_for_votes` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/deposit-jst-for-votes.md
- `moolah_borrow` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-borrow.md
- `moolah_liquidate` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-liquidate.md
- `moolah_repay` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-repay.md
- `moolah_supply_collateral` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-supply-collateral.md
- `moolah_vault_deposit` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-vault-deposit.md
- `moolah_vault_withdraw` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-vault-withdraw.md
- `moolah_withdraw_collateral` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/moolah-withdraw-collateral.md
- `rent_energy` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/rent-energy.md
- `repay` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/repay.md
- `supply` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/supply.md
- `transfer_trc20` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/transfer-trc20.md
- `transfer_trx` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/transfer-trx.md
- `withdraw` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/withdraw.md
- `withdraw_all` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/withdraw-all.md
- `withdraw_votes_from_proposal` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/withdraw-votes-from-proposal.md
- `withdraw_votes_to_jst` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/withdraw-votes-to-jst.md
- `wrap_trx` — Financial — https://policylayer.com/tools/justlend-mcp-server-justlend/wrap-trx.md
- `borrow` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/borrow.md
- `calculate_energy_rental_price` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/calculate-energy-rental-price.md
- `check_allowance` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/check-allowance.md
- `check_jst_allowance_for_voting` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/check-jst-allowance-for-voting.md
- `check_strx_withdrawal_eligibility` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/check-strx-withdrawal-eligibility.md
- `claim_moolah_mining_period` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/claim-moolah-mining-period.md
- `claim_v1_mining_period` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/claim-v1-mining-period.md
- `estimate_lending_energy` — Read — https://policylayer.com/tools/justlend-mcp-server-justlend/estimate-lending-energy.md
- …and 73 more: https://policylayer.com/tools/justlend-mcp-server-justlend.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=justlend-mcp-server-justlend · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/justlend-mcp-server-justlend