List all inline policies for an IAM user.
AI agents call list_user_policies to retrieve information from AWS IoT SiteWise 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 and enumerates IAM user policies without creating, modifying, deleting, or executing any actions. It is a read-only information lookup operation. The blast radius is minimal as it only exposes policy metadata already associated with a user, and an AI agent misusing this tool could at worst enumerate policies to inform further reconnaissance, but cannot directly cause damage.
From the tool's definition Tool name is 'list_user_policies' and description states 'List all inline policies for an IAM user.' The verb 'list' indicates a query operation with no data modification.
Attacks that exploit this kind of access
List all inline policies for an IAM user. It is categorised as a Read tool in the AWS IoT SiteWise MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AWS IoT SiteWise MCP Server MCP server in PolicyLayer and add a rule for list_user_policies: 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 AWS IoT SiteWise MCP Server. Nothing to install.
list_user_policies 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_user_policies 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_user_policies. 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_user_policies is provided by the AWS IoT SiteWise MCP Server MCP server (awslabs.aws-iot-sitewise-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.