AI agents call show_help to retrieve information from Ariadne without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays help information. It performs a read-only operation with no data modification, deletion, execution, or financial impact. The minimal blast radius and informational nature justify 'low' severity.
From the tool's definition Tool name 'show_help' and description 'Return a quick setup and usage guide for Ariadne. Call this first' indicate retrieval and display of static documentation/help content with no side effects.
Attacks that exploit this kind of access
Return a quick setup and usage guide for Ariadne. Call this first. It is categorised as a Read tool in the Ariadne MCP Server, which means it retrieves data without modifying state.
Register the Ariadne MCP server in PolicyLayer and add a rule for show_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 Ariadne. Nothing to install.
show_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 show_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 show_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.
show_help is provided by the Ariadne MCP server (whyy9527/ariadne). 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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