Get likes and recasts for a specific cast
AI agents call get-cast-reactions 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 fetches aggregate reaction metrics (likes and recasts) for a cast. It performs a read-only query of public Farcaster network data without creating, modifying, deleting, or executing any operations. The action is non-destructive and has no external side effects beyond data retrieval.
From the tool's definition Tool name 'get-cast-reactions' and description 'Get likes and recasts for a specific cast' indicate a retrieval operation that queries existing reaction data with no side effects.
Attacks that exploit this kind of access
Get likes and recasts for a specific cast. 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 get-cast-reactions: 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.
get-cast-reactions 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-cast-reactions 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-cast-reactions. 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-cast-reactions 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.
Teams ship this data inside their own products. See what a licence covers →