Get the total supply of a token given its address
AI agents call get_total_supply to retrieve information from Etherscan MCP Tool without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves immutable blockchain state (token total supply) based on a token address parameter. It has no side effects, cannot modify data, and poses minimal risk even if called with arbitrary token addresses. The worst outcome is returning data about an attacker's own token or legitimate public tokens, neither of which constitutes harm.
From the tool's definition Tool description states 'Get the total supply of a token given its address' — a pure data retrieval operation with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Get the total supply of a token given its address. It is categorised as a Read tool in the Etherscan MCP Tool MCP Server, which means it retrieves data without modifying state.
Register the Etherscan MCP Tool MCP server in PolicyLayer and add a rule for get_total_supply: 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 Etherscan MCP Tool. Nothing to install.
get_total_supply is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_total_supply 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.
Set action: deny in the PolicyLayer policy for get_total_supply. 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.
get_total_supply is provided by the Etherscan MCP Tool MCP server (septemhill/etherscan-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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