Lists attachments of a specific email
AI agents call list-attachments to retrieve information from Outlook Assistant without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves attachment metadata from an existing email without creating, modifying, or deleting any data. It has no side effects beyond returning information, making it a Read operation. The severity is low because listing attachments poses minimal risk—an agent cannot access attachment contents directly, delete attachments, or modify emails through this operation alone.
From the tool's definition The tool name 'list-attachments' and description 'Lists attachments of a specific email' indicate a retrieval operation with no modification capability.
Attacks that exploit this kind of access
Lists attachments of a specific email. It is categorised as a Read tool in the Outlook Assistant MCP Server, which means it retrieves data without modifying state.
Register the Outlook Assistant MCP server in PolicyLayer and add a rule for list-attachments: 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 Outlook Assistant. Nothing to install.
list-attachments 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-attachments 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-attachments. 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-attachments is provided by the Outlook Assistant MCP server (titanzero/outlook-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list-attachments is one line of Outlook Assistant's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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