# estimate_gas

Estimate the gas cost for a transaction

Agent View of the PolicyLayer registry record for `estimate_gas`. HTML page: https://policylayer.com/tools/chulanpro5-evm-mcp-server/estimate-gas

## Facts

- Tool: `estimate_gas`
- Server: EVM MCP Server (`chulanpro5/evm-mcp-server`) — https://policylayer.com/tools/chulanpro5-evm-mcp-server.md
- Homepage: https://github.com/chulanpro5/evm-mcp-server
- 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": "estimate_gas",
    "arguments": {}
  }
}
```

## Why estimate_gas is rated Low

This tool retrieves and calculates information (gas cost estimation) without executing transactions, modifying data, or triggering external side effects. It is purely informational, similar to other read operations like 'get_balance'. Gas estimation is a prerequisite query that precedes actual transaction execution but does not itself commit or modify blockchain state.

From the tool's own definition: "The tool name 'estimate_gas' and description 'Estimate the gas cost for a transaction' indicate a read-only operation that queries blockchain state to calculate gas fees without executing or modifying any transactions."

## Use case

AI agents call estimate_gas to retrieve information from EVM MCP Server 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 EVM MCP Server:

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

## Other tools on EVM MCP Server (35)

- `deploy_token` — Execute — https://policylayer.com/tools/chulanpro5-evm-mcp-server/deploy-token.md
- `enable_trading` — Execute — https://policylayer.com/tools/chulanpro5-evm-mcp-server/enable-trading.md
- `set_swap_and_liquify_enabled` — Execute — https://policylayer.com/tools/chulanpro5-evm-mcp-server/set-swap-and-liquify-enabled.md
- `write_contract` — Execute — https://policylayer.com/tools/chulanpro5-evm-mcp-server/write-contract.md
- `add_liquidity` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/add-liquidity.md
- `buy_usdt_from_wallet` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/buy-usdt-from-wallet.md
- `deploy_tax_token` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/deploy-tax-token.md
- `lock_lp_token` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/lock-lp-token.md
- `sell_usdt_from_wallet` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/sell-usdt-from-wallet.md
- `transfer_erc1155` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/transfer-erc1155.md
- `transfer_erc20` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/transfer-erc20.md
- `transfer_eth` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/transfer-eth.md
- `transfer_nft` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/transfer-nft.md
- `transfer_token` — Financial — https://policylayer.com/tools/chulanpro5-evm-mcp-server/transfer-token.md
- `check_nft_ownership` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/check-nft-ownership.md
- `get_address_from_private_key` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-address-from-private-key.md
- `get_balance` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-balance.md
- `get_block_by_number` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-block-by-number.md
- `get_chain_info` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-chain-info.md
- `get_erc1155_balance` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-erc1155-balance.md
- `get_erc1155_token_uri` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-erc1155-token-uri.md
- `get_erc20_balance` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-erc20-balance.md
- `get_latest_block` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-latest-block.md
- `get_nft_balance` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-nft-balance.md
- `get_nft_info` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-nft-info.md
- `get_supported_networks` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-supported-networks.md
- `get_token_balance` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-token-balance.md
- `get_token_balance_erc20` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-token-balance-erc20.md
- `get_token_info` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-token-info.md
- `get_transaction` — Read — https://policylayer.com/tools/chulanpro5-evm-mcp-server/get-transaction.md
- …and 5 more: https://policylayer.com/tools/chulanpro5-evm-mcp-server.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=chulanpro5-evm-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/chulanpro5-evm-mcp-server