modal_diagnose_app_startup
AI agents call modal_diagnose_app_startup 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.
The tool name suggests diagnostic inspection of app startup behavior. The server is explicitly described as 'read-only' and designed to enable agents to 'inspect' Modal infrastructure 'without granting mutation tools.' Diagnosing startup would involve querying logs, events, or status information rather than modifying system state. Empty description lowers confidence slightly, but server context is strong.
From the tool's definition Tool name 'modal_diagnose_app_startup' and server description emphasizing 'read-only Modal context' and 'inspect' capabilities without mutation tools.
Attacks that exploit this kind of access
modal_diagnose_app_startup. 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_diagnose_app_startup: 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_diagnose_app_startup 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_diagnose_app_startup 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_diagnose_app_startup. 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_diagnose_app_startup 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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