read_folder
AI agents call read_folder to retrieve information from AOL Mail MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves folder contents without side effects. Although the description is empty, the name 'read_folder' and the context of sibling read operations (read_email, read_inbox, list_folders) strongly indicate this is a data retrieval operation. No capability to modify, delete, or execute actions is implied. Severity is low because reading email folder metadata poses minimal risk even if misused by an agent.
From the tool's definition Tool name 'read_folder' combined with server description stating 'reading, searching, sending, and managing AOL Mail emails and folders via natural language'. Sibling tools include 'read_email' and 'read_inbox' which are clearly Read operations.
Attacks that exploit this kind of access
read_folder. It is categorised as a Read tool in the AOL Mail MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AOL Mail MCP Server MCP server in PolicyLayer and add a rule for read_folder: 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 AOL Mail MCP Server. Nothing to install.
read_folder 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 read_folder 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 read_folder. 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.
read_folder is provided by the AOL Mail MCP Server MCP server (kubegrind/aol-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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