Retrieve a preview (thumbnail) of a generated image.
AI agents call get_preview to retrieve information from FLUX MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and returns existing data (a preview/thumbnail of an already-generated image). It performs no modifications, deletions, code execution, or financial operations. The blast radius of misuse is minimal—an agent could only access image previews that already exist, with no ability to modify, delete, or generate new content.
From the tool's definition Tool name 'get_preview' and description 'Retrieve a preview (thumbnail) of a generated image' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Retrieve a preview (thumbnail) of a generated image. It is categorised as a Read tool in the FLUX MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FLUX MCP Server MCP server in PolicyLayer and add a rule for get_preview: 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 FLUX MCP Server. Nothing to install.
get_preview 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_preview 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_preview. 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_preview is provided by the FLUX MCP Server MCP server (tehw0lf/flux-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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