estimate_gas

Estimate the gas a transaction (to / data / value) would use and report the current gas price and rough AVAX cost, over RPC. No key needed.

SERVERAvalanche SOURCE@avakit/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-avakit-avalanche/estimate-gas.md

WHAT IT DOES

What estimate_gas does on Avalanche

AI agents call estimate_gas to retrieve information from Avalanche without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why estimate_gas is rated Low

Read-only estimation call; no state changes or transactions executed.

From the tool's definition Estimate the gas a transaction would use, No key needed

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs estimate_gas safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Avalanche, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For estimate_gas, this is the rule to start with:

estimate_gas Allowed

estimate_gas is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Avalanche, apply this rule, and every estimate_gas call is checked against it from then on.

FAQ

Questions about estimate_gas

What does the estimate_gas tool do? +

Estimate the gas a transaction (to / data / value) would use and report the current gas price and rough AVAX cost, over RPC. No key needed. It is categorised as a Read tool in the Avalanche MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on estimate_gas? +

Register the Avalanche MCP server in PolicyLayer and add a rule for estimate_gas: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Avalanche. Nothing to install.

What risk level is estimate_gas? +

estimate_gas is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit estimate_gas? +

Yes. Add a rate_limit block to the estimate_gas rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block estimate_gas completely? +

Set action: deny in the PolicyLayer policy for estimate_gas. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides estimate_gas? +

estimate_gas is provided by the Avalanche MCP server (@avakit/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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