Find and list image files in a directory
AI agents call list-images to retrieve information from Image Viewer MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates data about images in the filesystem. It performs discovery only, matching the Read category (search, list, get, fetch). No data is created, modified, deleted, or executed. Severity is low because listing directory contents is a minimal-privilege operation with no blast radius for accidental misuse.
From the tool's definition Tool name is 'list-images' and description states 'Find and list image files in a directory' — a pure query/retrieval operation with no side effects.
Attacks that exploit this kind of access
Find and list image files in a directory. It is categorised as a Read tool in the Image Viewer MCP MCP Server, which means it retrieves data without modifying state.
Register the Image Viewer MCP server in PolicyLayer and add a rule for list-images: 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 Image Viewer MCP. Nothing to install.
list-images 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 list-images 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 list-images. 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.
list-images is provided by the Image Viewer MCP server (itrimble/image-viewer-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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