This record as markdown: /tools/aws/list-policies.md
What list_policies does on AWS
AI agents call list_policies to retrieve information from AWS without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why list_policies is rated Low
The 'list_policies' tool retrieves or enumerates IAM policies. Despite the empty description creating some ambiguity, the tool name itself is explicitly a 'list' operation, which is a read-only action with no modification or deletion of data. Context from sibling tools (attach_user_policy, attach_group_policy) confirms this is part of an IAM management suite.
From the tool's definition Tool name 'list_policies' and its AWS service context indicate a query operation. The naming convention follows standard AWS read patterns (list_*). No description provided to confirm side effects.
Attacks that exploit this kind of access
The rule that runs list_policies safely
PolicyLayer is an MCP gateway: it sits between your AI agents and AWS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_policies, this is the rule to start with:
list_policies is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect AWS, apply this rule, and every list_policies call is checked against it from then on.
Questions about list_policies
list_policies is a read tool on the AWS MCP server. It is categorised as a Read tool in the AWS MCP Server, which means it retrieves data without modifying state.
Register the AWS MCP server in PolicyLayer and add a rule for list_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. Nothing to install.
list_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_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_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_policies is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on AWS, and thousands of servers like it.
This server
Across the catalogue