Get messages from a specific Instagram Direct Message thread by thread ID, with an optional limit. Args: thread_id: The thread ID to fetch messages from. amount: Number of messages to fetch (default 20). Returns: A dictionary with success status and the list of messages or error message.
AI agents call list_messages 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 performs a query operation to retrieve existing data (messages) from a specified thread with no side effects or mutations. The parameters (thread_id, amount) are used only for filtering/pagination of results. No creation, modification, deletion, or execution of external operations occurs.
From the tool's definition Tool retrieves messages from an Instagram DM thread by thread ID with optional limit (amount parameter). Description explicitly states 'Get messages' with no modification, deletion, or execution capabilities mentioned.
Documented attack patterns abuse exactly the kind of access list_messages 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 list_messages:
{
"version": "1",
"default": "deny",
"tools": {
"list_messages": {}
}
}list_messages is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get messages from a specific Instagram Direct Message thread by thread ID, with an optional limit. Args: thread_id: The thread ID to fetch messages from. amount: Number of messages to fetch (default 20). Returns: A dictionary with success status and the list of messages or error message. 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 list_messages: 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.
list_messages 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_messages 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_messages. 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_messages 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.
Free to start. No card required.
25 Instagram DM MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.