modal_discovery_server_info
AI agents call modal_discovery_server_info 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.
This tool retrieves or queries Modal server discovery information without side effects. The server's stated read-only design and the absence of descriptive text suggest this is a basic information lookup. Even with empty description, the server architecture and tool naming convention indicate Read category. Severity is low because server discovery information typically has minimal impact if misused by an agent.
From the tool's definition Server explicitly described as 'read-only Modal context' with no mutation tools granted. Tool name 'modal_discovery_server_info' suggests information retrieval about Modal servers.
Attacks that exploit this kind of access
modal_discovery_server_info. It is categorised as a Read tool in the Modal MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Modal MCP Server MCP server in PolicyLayer and add a rule for modal_discovery_server_info: 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.
modal_discovery_server_info 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 modal_discovery_server_info 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 modal_discovery_server_info. 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.
modal_discovery_server_info 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.
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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