AI agents call browse_apps to retrieve information from Tru without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists existing application data without creating, modifying, or deleting anything. It is purely informational discovery functionality, making it a Read category risk with low severity since disclosure of app directory information poses minimal security risk.
From the tool's definition Tool description states 'List all apps in the tru directory' and 'Returns active apps with their service names, descriptions, and websites.' These are read-only query operations with no data modification or side effects.
Attacks that exploit this kind of access
List all apps in the tru directory. Returns active apps with their service names, descriptions, and websites. Use this to find services an agent can interact with. It is categorised as a Read tool in the Tru MCP Server, which means it retrieves data without modifying state.
Register the Tru MCP server in PolicyLayer and add a rule for browse_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 Tru. Nothing to install.
browse_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 browse_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 browse_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.
browse_apps is provided by the Tru MCP server (tru-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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