AI agents call xkcd_help to retrieve information from Xkcd without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and displays help/documentation information about the xkcd-mcp server and its tools. It does not modify, execute, delete, or commit any resources. It is a pure information retrieval operation with no blast radius if misused by an AI agent.
From the tool's definition Tool name is 'xkcd_help' and description states it gets 'help and usage information' — a retrieval action with no side effects.
Attacks that exploit this kind of access
Get help and usage information for xkcd-mcp tools and configuration. It is categorised as a Read tool in the Xkcd MCP Server, which means it retrieves data without modifying state.
Register the Xkcd MCP server in PolicyLayer and add a rule for xkcd_help: 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 Xkcd. Nothing to install.
xkcd_help 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 xkcd_help 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 xkcd_help. 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.
xkcd_help is provided by the Xkcd MCP server (sandraschi/xkcd-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 →