AI agents call appd_list_applications to retrieve information from Appd without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and lists existing applications without modifying, executing, or deleting any data. It is a straightforward read operation that retrieves metadata about business applications. The server is explicitly described as read-only, and the tool performs no side effects. The low severity reflects minimal blast radius if misused—listing applications reveals observability scope but causes no damage.
From the tool's definition Tool name 'appd_list_applications' and server description 'read-only MCP server' and function to 'List business applications' indicate pure data retrieval with no modification, deletion, or execution.
Attacks that exploit this kind of access
List business applications visible to the configured API Client. Optionally filter to apps that have been. It is categorised as a Read tool in the Appd MCP Server, which means it retrieves data without modifying state.
Register the Appd MCP server in PolicyLayer and add a rule for appd_list_applications: 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 Appd. Nothing to install.
appd_list_applications 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 appd_list_applications 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 appd_list_applications. 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.
appd_list_applications is provided by the Appd MCP server (jagalliers/appd-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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