List all blockchain networks supported by Relay for bridging and swapping. Returns chain IDs, names, native currencies, and status. Use this to resolve chain names to chain IDs before calling other tools.
AI agents call get_supported_chains to retrieve information from Relay MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries static reference data about supported blockchain networks. It retrieves information for use in downstream operations but makes no changes, executes no transactions, and triggers no external operations. The low severity reflects minimal blast radius—misuse would only return unwanted chain information, not compromise funds or data integrity.
From the tool's definition Tool name 'get_supported_chains' and description 'List all blockchain networks supported by Relay' indicate data retrieval with 'no side effects'. Returns informational data: 'chain IDs, names, native currencies, and status'.
Attacks that exploit this kind of access
List all blockchain networks supported by Relay for bridging and swapping. Returns chain IDs, names, native currencies, and status. Use this to resolve chain names to chain IDs before calling other tools. It is categorised as a Read tool in the Relay MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Relay MCP Server MCP server in PolicyLayer and add a rule for get_supported_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 Relay MCP Server. Nothing to install.
get_supported_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 get_supported_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 get_supported_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.
get_supported_chains is provided by the Relay MCP Server MCP server (relayprotocol/relay-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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