download_all_attachments
Download all attachments from a message as a base64-encoded ZIP file. Warning: may produce very long responses for messages with large attachments (up to 25 MB total).
This record as markdown: /tools/trekmail-mcp-server/download-all-attachments.md
What download_all_attachments does on TrekMail MCP Server
AI agents call download_all_attachments to retrieve information from TrekMail MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why download_all_attachments is rated Low
This tool retrieves and encodes attachment data for download without creating, modifying, deleting, or executing any operations. The warning about response size indicates a resource concern rather than a risk category change. Download and retrieval operations are categorized as Read.
From the tool's definition Tool description states 'Download all attachments from a message as a base64-encoded ZIP file' — a retrieval operation with no modification, deletion, or execution of code.
Attacks that exploit this kind of access
The rule that runs download_all_attachments safely
PolicyLayer is an MCP gateway: it sits between your AI agents and TrekMail MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For download_all_attachments, this is the rule to start with:
download_all_attachments is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect TrekMail MCP Server, apply this rule, and every download_all_attachments call is checked against it from then on.
Questions about download_all_attachments
Download all attachments from a message as a base64-encoded ZIP file. Warning: may produce very long responses for messages with large attachments (up to 25 MB total). It is categorised as a Read tool in the TrekMail MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TrekMail MCP Server MCP server in PolicyLayer and add a rule for download_all_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 TrekMail MCP Server. Nothing to install.
download_all_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 download_all_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 download_all_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.
download_all_attachments is provided by the TrekMail MCP Server MCP server (trekmail/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on TrekMail MCP Server, and thousands of servers like it.
This server
Across the catalogue