List Farcaster channels with optional filtering
AI agents call list-channels to retrieve information from Farcaster 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 and queries channel metadata from the Farcaster network without creating, modifying, deleting, or executing operations. The optional filtering is a standard query parameter for constraining results. No side effects or state changes occur.
From the tool's definition Tool name 'list-channels' and description 'List Farcaster channels with optional filtering' indicate data retrieval without modification. All sibling tools are read operations (get-*, search-*), consistent with a read-only server.
Attacks that exploit this kind of access
List Farcaster channels with optional filtering. It is categorised as a Read tool in the Farcaster MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Farcaster MCP Server MCP server in PolicyLayer and add a rule for list-channels: 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 Farcaster MCP Server. Nothing to install.
list-channels 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-channels 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-channels. 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-channels is provided by the Farcaster MCP Server MCP server (manimohans/farcaster-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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