AI agents call list_items to retrieve information from MCP Demo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data (demo items) without creating, modifying, deleting, or executing anything. It matches the Read category pattern of safe data retrieval. Severity is low because listing demo items poses minimal risk—the blast radius of misuse is limited to information disclosure of non-sensitive demo data.
From the tool's definition Tool name 'list_items' and description 'List demo items' indicate a retrieval operation with no side effects. Listing operations are read-only queries that do not modify, delete, or execute code.
Attacks that exploit this kind of access
List demo items. It is categorised as a Read tool in the MCP Demo MCP Server, which means it retrieves data without modifying state.
Register the MCP Demo MCP server in PolicyLayer and add a rule for list_items: 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 MCP Demo. Nothing to install.
list_items 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_items 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_items. 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_items is provided by the MCP Demo MCP server (tanteng/mcp-demo). 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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