List all supported EVM-compatible chains and their configurations
AI agents call list-chains to retrieve information from Blockchain MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves configuration data about blockchain networks. It performs no mutations, does not execute code, and does not create, modify, or delete any resources. It is a simple informational read operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name is 'list-chains' and description states it 'List all supported EVM-compatible chains and their configurations' — a purely informational query with no side effects or state modifications.
Attacks that exploit this kind of access
List all supported EVM-compatible chains and their configurations. It is categorised as a Read tool in the Blockchain MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Blockchain MCP Server MCP server in PolicyLayer and add a rule for list-chains: 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 Blockchain MCP Server. Nothing to install.
list-chains 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 list-chains 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 list-chains. 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.
list-chains is provided by the Blockchain MCP Server MCP server (lienhage/blockchain-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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