get_attachment_url
AI agents call get_attachment_url to retrieve information from Outline MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves an attachment URL from Outline documents. This is a read-only operation that queries/fetches data with no side effects. The empty description prevents higher confidence, but the naming convention and server purpose strongly suggest data retrieval rather than modification, execution, or destruction.
From the tool's definition Tool name 'get_attachment_url' and server context ('document search, reading, and management') indicate retrieval of attachment URLs without modification. Description is empty, lowering confidence slightly.
Attacks that exploit this kind of access
get_attachment_url. It is categorised as a Read tool in the Outline MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Outline MCP Server MCP server in PolicyLayer and add a rule for get_attachment_url: 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 Outline MCP Server. Nothing to install.
get_attachment_url 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_url 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_url. 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_url is provided by the Outline MCP Server MCP server (mcp-outline). 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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