AI agents call get_friend_count to retrieve information from LineWhiz without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical analytics data (friend/follower count on a specific date). It is a read-only query operation with no capability to modify, delete, or execute actions. The blast radius of misuse is minimal—an attacker could only gain visibility into account follower metrics, which is informational only.
From the tool's definition Tool name 'get_friend_count' and description 'Get the number of LINE OA friends/followers on a specific date' indicates a retrieval operation that queries analytics data without modification or side effects.
Attacks that exploit this kind of access
Get the number of LINE OA friends/followers on a specific date. It is categorised as a Read tool in the LineWhiz MCP Server, which means it retrieves data without modifying state.
Register the LineWhiz MCP server in PolicyLayer and add a rule for get_friend_count: 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 LineWhiz. Nothing to install.
get_friend_count 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_friend_count 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_friend_count. 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_friend_count is provided by the LineWhiz MCP server (kinzen-dev/linewhiz). 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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