Download a file attachment from a FuseBase page. Returns the file content as base64-encoded data with MIME type and size. Use get_page_attachments to find attachment IDs first.
AI agents call download_attachment to retrieve information from Fusebase MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing file content from a FuseBase page without creating, modifying, or deleting data. It is a read-only operation that queries and returns attachment data. The severity is low because downloading existing files has minimal blast radius—the agent gains access to existing information but cannot alter, destroy, or create new data.
From the tool's definition Tool description states it 'Download[s] a file attachment' and 'Returns the file content as base64-encoded data with MIME type and size.' The word 'download' and 'returns' indicate data retrieval with no modification or deletion of the underlying attachment.
Attacks that exploit this kind of access
Download a file attachment from a FuseBase page. Returns the file content as base64-encoded data with MIME type and size. Use get_page_attachments to find attachment IDs first. It is categorised as a Read tool in the Fusebase MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Fusebase MCP Server MCP server in PolicyLayer and add a rule for download_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 Fusebase MCP Server. Nothing to install.
download_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 download_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 download_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.
download_attachment is provided by the Fusebase MCP Server MCP server (ryan-haver/fusebase-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.
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