List media files in the PostEverywhere media library. Supports filtering by type (image, video, document) and pagination. Returns file metadata including URLs, dimensions, and upload status. Use this to find existing media to attach to posts.
AI agents call list_media to retrieve information from Posteverywhere without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries media file metadata from the PostEverywhere media library without side effects. It supports filtering and pagination but does not create, modify, delete, or execute any actions. The blast radius of misuse is minimal—an AI agent could only enumerate or exfiltrate metadata about media files already owned by the user, which constitutes information disclosure rather than operational harm.
From the tool's definition Tool description states it 'List media files' and 'Returns file metadata' with no capability to modify, delete, or execute operations. The verb 'List' and the stated use case of finding existing media are characteristic of read-only operations.
Attacks that exploit this kind of access
List media files in the PostEverywhere media library. Supports filtering by type (image, video, document) and pagination. Returns file metadata including URLs, dimensions, and upload status. Use this to find existing media to attach to posts. It is categorised as a Read tool in the Posteverywhere MCP Server, which means it retrieves data without modifying state.
Register the Posteverywhere MCP server in PolicyLayer and add a rule for list_media: 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 Posteverywhere. Nothing to install.
list_media 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_media 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_media. 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_media is provided by the Posteverywhere MCP server (posteverywhere/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_media is one line of Posteverywhere's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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