AI agents call search_attachments to retrieve information from MCP Email Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool searches for attachments matching patterns in directories. This is a query operation with no side effects—it retrieves information without modifying, creating, deleting, or executing anything. The lack of a formal description lowers confidence slightly, but the name and server context clearly indicate a read operation.
From the tool's definition Tool name 'search_attachments' combined with sibling tool 'search_attachments_tool' and server capability to 'search for files in specified directories that match given patterns' indicates a read/retrieval operation.
Documented attack patterns abuse exactly the kind of access search_attachments gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Email Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_attachments:
{
"version": "1",
"default": "deny",
"tools": {
"search_attachments": {}
}
}search_attachments is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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search_attachments. It is categorised as a Read tool in the MCP Email Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Email Server MCP server in PolicyLayer and add a rule for search_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 MCP Email Server. Nothing to install.
search_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 search_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 search_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.
search_attachments is provided by the MCP Email Server MCP server (shy2593666979/mcp-server-email). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 MCP Email Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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4 MCP Email Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.