modal_ls_volume · Modal MCP Server MCP: Risk & Policy

WHAT IT DOES

What modal_ls_volume does on Modal MCP Server

AI agents call modal_ls_volume to retrieve information from Modal MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why modal_ls_volume needs a policy

This tool retrieves or queries volume metadata/contents without side effects. The server's read-only design and the absence of any write, delete, or execute keywords in the tool name confirm it is a Read operation with low severity.

From the tool's definition Tool name 'modal_ls_volume' indicates a list/inspect operation on volumes. Server description explicitly states it is 'read-only' and enables agents to 'inspect Modal apps, deployments, logs, containers, volumes, and sandboxes without granting mutation…

Attacks that exploit this kind of access

Questions about modal_ls_volume

What does the modal_ls_volume tool do? +

modal_ls_volume. It is categorised as a Read tool in the Modal MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on modal_ls_volume? +

Register the Modal MCP Server MCP server in PolicyLayer and add a rule for modal_ls_volume: 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 Modal MCP Server. Nothing to install.

What risk level is modal_ls_volume? +

modal_ls_volume is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit modal_ls_volume? +

Yes. Add a rate_limit block to the modal_ls_volume 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.

How do I block modal_ls_volume completely? +

Set action: deny in the PolicyLayer policy for modal_ls_volume. 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.

What MCP server provides modal_ls_volume? +

modal_ls_volume is provided by the Modal MCP Server MCP server (php-workx/modal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.