AI agents call erc1155_uri to retrieve information from MCP Ethers Wallet without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
ERC-1155 URI retrieval is a read-only operation that queries immutable token metadata from the blockchain. It has no side effects, does not modify data, and does not execute code or move funds. The absence of a description lowers confidence slightly, but the naming pattern and ERC-1155 standard strongly suggest a metadata query function.
From the tool's definition Tool name 'erc1155_uri' with no description provided. Based on naming convention and ERC-1155 standard, this retrieves the URI metadata for a token, analogous to tokenURI in ERC-721.
Documented attack patterns abuse exactly the kind of access erc1155_uri gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Ethers Wallet, and nothing reaches the server without passing your rules. This is the rule we recommend for erc1155_uri:
{
"version": "1",
"default": "deny",
"tools": {
"erc1155_uri": {}
}
}erc1155_uri is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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erc1155_uri. It is categorised as a Read tool in the MCP Ethers Wallet MCP Server, which means it retrieves data without modifying state.
Register the MCP Ethers Wallet MCP server in PolicyLayer and add a rule for erc1155_uri: 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 MCP Ethers Wallet. Nothing to install.
erc1155_uri 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 erc1155_uri 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 erc1155_uri. 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.
erc1155_uri is provided by the MCP Ethers Wallet MCP server (crazyrabbitltc/mcp-ethers-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Ethers Wallet, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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69 MCP Ethers Wallet tools catalogued and risk-classified — across an index of 43,000+ MCP servers.