modal_get_sandbox · Modal MCP Server MCP: Risk & Policy

WHAT IT DOES

What modal_get_sandbox does on Modal MCP Server

AI agents call modal_get_sandbox 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_get_sandbox needs a policy

The tool is part of a read-only server designed for inspection without mutation capabilities. The naming convention ('get_') and context among sibling read-only tools (get_app, get_app_logs, get_container_logs, get_environment) strongly indicate this retrieves sandbox information without side effects.

From the tool's definition Tool name 'modal_get_sandbox' and server description explicitly states 'read-only Modal context' that 'Enables agents to inspect Modal apps, deployments, logs, containers, volumes, and sandboxes without granting mutation tools.' No description provided for…

Attacks that exploit this kind of access

Questions about modal_get_sandbox

What does the modal_get_sandbox tool do? +

modal_get_sandbox. 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_get_sandbox? +

Register the Modal MCP Server MCP server in PolicyLayer and add a rule for modal_get_sandbox: 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_get_sandbox? +

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

Can I rate-limit modal_get_sandbox? +

Yes. Add a rate_limit block to the modal_get_sandbox 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_get_sandbox completely? +

Set action: deny in the PolicyLayer policy for modal_get_sandbox. 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_get_sandbox? +

modal_get_sandbox 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.