List all snapshots for the range. Args: user_id: Optional user ID (admin only) Returns: List of snapshots
AI agents call list_snapshots to retrieve information from Ludus FastMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a list of existing snapshots. It performs no modifications, deletions, or external operations. The optional user_id parameter is for access control (admin-only filtering), not for performing actions. This is a straightforward read/query operation with minimal blast radius.
From the tool's definition Tool name 'list_snapshots' and description 'List all snapshots for the range' with return value 'List of snapshots' indicate a retrieval operation with no side effects.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access list_snapshots gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ludus FastMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_snapshots:
{
"version": "1",
"default": "deny",
"tools": {
"list_snapshots": {}
}
}list_snapshots is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all snapshots for the range. Args: user_id: Optional user ID (admin only) Returns: List of snapshots. It is categorised as a Read tool in the Ludus FastMCP MCP Server, which means it retrieves data without modifying state.
Register the Ludus Fast MCP server in PolicyLayer and add a rule for list_snapshots: 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 Ludus FastMCP. Nothing to install.
list_snapshots 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_snapshots 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_snapshots. 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_snapshots is provided by the Ludus Fast MCP server (tjnull/ludus-fastmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 201 Ludus FastMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.