Get the metadata and download URL for a single sandbox attachment.
AI agents call get-sandbox-attachment to retrieve information from Mcp Mailtrap without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves attachment metadata and generates a download URL for an already-existing sandbox attachment. It performs no write operations, does not execute code or external actions, and does not delete or modify data. The worst-case misuse (downloading unintended attachments) has minimal security blast radius in a sandbox environment where test emails are typically isolated.
From the tool's definition Tool description: 'Get the metadata and download URL for a single sandbox attachment.' The verb 'get' and actions 'retrieve metadata' and 'provide download URL' indicate read-only retrieval with no data modification, deletion, or execution.
Attacks that exploit this kind of access
Get the metadata and download URL for a single sandbox attachment. It is categorised as a Read tool in the Mcp Mailtrap MCP Server, which means it retrieves data without modifying state.
Register the Mcp Mailtrap MCP server in PolicyLayer and add a rule for get-sandbox-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 Mcp Mailtrap. Nothing to install.
get-sandbox-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-sandbox-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-sandbox-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-sandbox-attachment is provided by the Mcp Mailtrap MCP server (mcp-mailtrap). 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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