list_apps
AI agents call list_apps to retrieve information from Mezmo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves application metadata from Mezmo for discovery purposes. No modification, deletion, or code execution occurs. Severity is low because listing available apps has minimal blast radius if misused by an agent—it only exposes metadata about applications without accessing sensitive log data itself.
From the tool's definition Tool name 'list_apps' indicates listing/discovery operation with no write or execute capabilities. Server description emphasizes 'retrieving and filtering logs' without mentioning mutation or execution.
Attacks that exploit this kind of access
list_apps. It is categorised as a Read tool in the Mezmo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Mezmo MCP Server MCP server in PolicyLayer and add a rule for list_apps: 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 Mezmo MCP Server. Nothing to install.
list_apps 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 list_apps 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 list_apps. 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.
list_apps is provided by the Mezmo MCP Server MCP server (riefer02/mezmo-logs-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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