Retrieves a specific attachment from an email, including its base64 content.
AI agents call get-attachment to retrieve information from Outlook MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a read-only operation: it fetches and returns attachment data without modifying, executing, or deleting anything. The user must already have access to the email and know which attachment to retrieve. Blast radius is minimal—the worst outcome of misuse is unauthorized access to already-accessible attachment data within an authorized email account.
From the tool's definition Tool 'get-attachment' is described as retrieving a specific attachment from an email, including its base64 content. This is a retrieval operation with no modification, deletion, or execution of the attachment content.
Attacks that exploit this kind of access
Retrieves a specific attachment from an email, including its base64 content. It is categorised as a Read tool in the Outlook MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Outlook MCP Server MCP server in PolicyLayer and add a rule for get-attachment: 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 MCP Server. Nothing to install.
get-attachment 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 get-attachment 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 get-attachment. 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.
get-attachment is provided by the Outlook MCP Server MCP server (peacockery-studio/outlook-mcp). 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.
Teams ship this data inside their own products. See what a licence covers →