AI agents call nw_list_failed_savesets to retrieve information from Ppdm without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical backup operation status data (failed savesets) without modifying, deleting, or executing any operations. It is a passive query operation on existing backup metadata. The potential impact of misuse is minimal—an agent could only gather information about failed backups, which poses no direct risk to infrastructure or data.
From the tool's definition Tool name is 'nw_list_failed_savesets' and description is 'List NetWorker savesets that did not complete successfully.' The verb 'list' and the action of querying/retrieving backup status information indicates a read-only operation with no side effects.
Attacks that exploit this kind of access
List NetWorker savesets that did not complete successfully. It is categorised as a Read tool in the Ppdm MCP Server, which means it retrieves data without modifying state.
Register the Ppdm MCP server in PolicyLayer and add a rule for nw_list_failed_savesets: 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 Ppdm. Nothing to install.
nw_list_failed_savesets 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 nw_list_failed_savesets 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 nw_list_failed_savesets. 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.
nw_list_failed_savesets is provided by the Ppdm MCP server (moodswing9/ppdm-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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