list_chains
AI agents call list_chains to retrieve information from Fuul MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name 'list_chains' strongly implies a query or retrieval operation (list = read-only enumeration). Context from sibling tools (approve_payouts, create_incentive, delete_trigger, etc.) confirms this server performs various actions, but 'list_chains' itself appears to be a data retrieval operation with no side effects. Confidence is moderate because the description is empty and context is limited to the tool name.
From the tool's definition Tool name 'list_chains' suggests retrieval or enumeration of chain data without modification. No description provided to confirm exact behavior.
Attacks that exploit this kind of access
list_chains. It is categorised as a Read tool in the Fuul MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Fuul 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 Fuul 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 Fuul MCP Server MCP server (kuyen-labs/mcp_server). 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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