AI agents call dd_list_storage_units 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 queries and returns information about storage units without creating, modifying, deleting, or executing any operations. It is a straightforward read operation that retrieves infrastructure metadata from the backup system. The low severity reflects that exposure of this information alone does not enable destructive or financial harm, though the metadata could inform further reconnaissance.
From the tool's definition Tool description: 'List DDBoost storage units on Data Domain — name, assigned user, quota, and status.' The verb 'list' and the read-only nature of retrieving storage unit information (name, user, quota, status) indicate this is a data retrieval operation…
Attacks that exploit this kind of access
List DDBoost storage units on Data Domain — name, assigned user, quota, and status. 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 dd_list_storage_units: 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.
dd_list_storage_units 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 dd_list_storage_units 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 dd_list_storage_units. 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.
dd_list_storage_units 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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