AI agents call get_newest_index to retrieve information from PTT MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name pattern 'get_*' combined with 'newest_index' indicates retrieval of bulletin board index metadata. This is a passive read operation with no side effects. The lack of description lowers confidence slightly, but the naming context within the PTT bulletin board system and sibling read-only tools strongly indicates data retrieval rather than modification, execution, or destructive operations.
From the tool's definition Tool name 'get_newest_index' strongly suggests retrieval of index data (read-only operation). No description provided, but naming convention indicates a query/fetch operation.
Documented attack patterns abuse exactly the kind of access get_newest_index gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PTT MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_newest_index:
{
"version": "1",
"default": "deny",
"tools": {
"get_newest_index": {}
}
}get_newest_index is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_newest_index. It is categorised as a Read tool in the PTT MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PTT MCP Server MCP server in PolicyLayer and add a rule for get_newest_index: 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 PTT MCP Server. Nothing to install.
get_newest_index 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 get_newest_index 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 get_newest_index. 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.
get_newest_index is provided by the PTT MCP Server MCP server (pyptt/ptt_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 26 PTT MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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26 PTT MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.