AI agents call list_chats 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.
'List' operations are characteristically Read category—they query and return existing data without side effects. Even though the description is empty, the naming convention and context of related tools on the same server (which include explicit Read operations like 'get_user_info', 'get_user_followers') support classification as Read.
From the tool's definition Tool name 'list_chats' suggests retrieving or querying existing chat threads. The empty description limits certainty, but sibling tools like 'get_thread_details' and 'get_thread_by_participants' confirm this server retrieves messaging data.
Documented attack patterns abuse exactly the kind of access list_chats 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_chats:
{
"version": "1",
"default": "deny",
"tools": {
"list_chats": {}
}
}list_chats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_chats. 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_chats: 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_chats 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_chats 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_chats. 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_chats 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.