AI agents call countdown.gif to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool generates a visual asset (countdown GIF) based on input parameters but performs no side effects: it does not modify state, execute code, delete data, or commit financial transactions. The rendered GIF is deterministic output from a timestamp input, characteristic of Read operations.
From the tool's definition Tool renders and returns an animated GIF to a specified timestamp; described as returning 'raw GIF bytes' with no mutation, deletion, or execution capabilities.
Attacks that exploit this kind of access
Render an animated countdown GIF to a target ISO-8601 timestamp. Returns raw GIF bytes (base64 in MCP transport). It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for countdown.gif: 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. Nothing to install.
countdown.gif 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 countdown.gif 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 countdown.gif. 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.
countdown.gif is provided by the MCP server (@2sio/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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