This record as markdown: /tools/aws/list-groups.md
What list_groups does on AWS
AI agents call list_groups 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_groups is rated Low
The tool lists AWS groups without creating, modifying, deleting, or executing operations. The 'list_*' naming pattern is canonical for Read operations that retrieve and enumerate resources. Sibling tools like 'add_user_to_group' and 'attach_group_policy' are clearly Write/Execute; this tool's name suggests the opposite—passive discovery.
From the tool's definition Tool name 'list_groups' indicates retrieval/enumeration of AWS groups with no side effects. Description is empty, but the tool name clearly suggests a query operation consistent with Read category semantics (e.g., similar to AWS IAM ListGroups API).
Attacks that exploit this kind of access
The rule that runs list_groups 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_groups, this is the rule to start with:
list_groups 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_groups call is checked against it from then on.
Questions about list_groups
list_groups 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_groups: 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_groups 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_groups 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_groups. 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_groups 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.
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