Retrieves a list of memos from a specified channel. When no channel ID is provided, uses the currently active channel. Returns paginated results with memo information.
AI agents call memo_list to retrieve information from Ninetn MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely queries and retrieves data (memos) from a channel without side effects. It is a read-only operation that fetches existing information. The minimal severity reflects that retrieval of memo lists poses negligible risk even if misused by an agent, as no data is modified, deleted, or executed.
From the tool's definition Tool description states it 'Retrieves a list of memos' and 'Returns paginated results' with no modification, deletion, or execution capabilities mentioned.
Attacks that exploit this kind of access
Retrieves a list of memos from a specified channel. When no channel ID is provided, uses the currently active channel. Returns paginated results with memo information. It is categorised as a Read tool in the Ninetn MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Ninetn MCP Server MCP server in PolicyLayer and add a rule for memo_list: 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 Ninetn MCP Server. Nothing to install.
memo_list 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 memo_list 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 memo_list. 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.
memo_list is provided by the Ninetn MCP Server MCP server (diatonic-codes/ninetn-mcp-server). 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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