Download media from a shared post/reel/clip in a DM message and get the local file path. Args: message_id: The ID of the message containing the shared post/reel/clip thread_id: The ID of the thread containing the message download_path: Directory to save the downloaded file (default: ./downloads) ...
AI agents call download_shared_post_from_message to retrieve information from Instagram DM MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/downloads media content from an existing Instagram DM message to a local file path. It reads data from Instagram and saves it locally without modifying or deleting any remote data. Writing to a local directory is a side effect of retrieval, similar to a fetch/download operation. Severity is low as it only reads message media that is already accessible to the user.
From the tool's definition Download media from a shared post/reel/clip in a DM message and get the local file path
Documented attack patterns abuse exactly the kind of access download_shared_post_from_message gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Instagram DM MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for download_shared_post_from_message:
{
"version": "1",
"default": "deny",
"tools": {
"download_shared_post_from_message": {}
}
}download_shared_post_from_message is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download media from a shared post/reel/clip in a DM message and get the local file path. Args: message_id: The ID of the message containing the shared post/reel/clip thread_id: The ID of the thread containing the message download_path: Directory to save the downloaded file (default: ./downloads) Returns: A dictionary containing success status, a status message, and the file path if successful. It is categorised as a Read tool in the Instagram DM MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Instagram DM MCP Server MCP server in PolicyLayer and add a rule for download_shared_post_from_message: 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 Instagram DM MCP Server. Nothing to install.
download_shared_post_from_message 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 download_shared_post_from_message 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 download_shared_post_from_message. 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.
download_shared_post_from_message is provided by the Instagram DM MCP Server MCP server (trypeggy/instagram_dm_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 25 Instagram DM MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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25 Instagram DM MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.