Get a temporary link to upload an additional format (e.g. EPUB, MOBI, PDF) to an existing book. Returns a signed URL that opens a file upload form in the browser. The link expires in 10 minutes. IMPORTANT: Always present this URL as a markdown link like [Add Format](url) so the full URL is preser...
AI agents call get_add_format_link to retrieve information from Lyceum without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves a signed URL; it does not itself perform the upload or modify any data. The actual upload would be a separate action by the user clicking the link in a browser. Generating a link is a read/query operation with minimal blast radius.
From the tool's definition Get a temporary link to upload an additional format... Returns a signed URL that opens a file upload form in the browser.
Attacks that exploit this kind of access
Get a temporary link to upload an additional format (e.g. EPUB, MOBI, PDF) to an existing book. Returns a signed URL that opens a file upload form in the browser. The link expires in 10 minutes. IMPORTANT: Always present this URL as a markdown link like [Add Format](url) so the full URL is preserved in the href. It is categorised as a Read tool in the Lyceum MCP Server, which means it retrieves data without modifying state.
Register the Lyceum MCP server in PolicyLayer and add a rule for get_add_format_link: 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 Lyceum. Nothing to install.
get_add_format_link 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_add_format_link 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_add_format_link. 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_add_format_link is provided by the Lyceum MCP server (matthewp/lyceum). 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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