【列出会话】当用户说
AI agents call list_sessions to retrieve information from MCP Session Saver 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 (lists sessions) with no side effects or data modification. It falls squarely into the Read category. Severity is low because listing sessions poses minimal risk—it exposes metadata about stored conversations but does not modify, delete, or execute arbitrary operations.
From the tool's definition Tool name is 'list_sessions' and functionality is to retrieve/enumerate stored session records. The sibling tool 'read_session' and overall server description emphasize searching and managing conversation records, indicating this lists existing sessions…
Attacks that exploit this kind of access
【列出会话】当用户说. It is categorised as a Read tool in the MCP Session Saver MCP Server, which means it retrieves data without modifying state.
Register the MCP Session Saver MCP server in PolicyLayer and add a rule for list_sessions: 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 Session Saver. Nothing to install.
list_sessions 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_sessions 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_sessions. 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_sessions is provided by the MCP Session Saver MCP server (oscar-wang-xin/mcp-session-saver). 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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