Lists recent Access Denied or Unauthorized events from CloudTrail.
AI agents call list_access_denied_events to retrieve information from AWS 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 historical security event data from AWS CloudTrail for inspection and analysis purposes. It performs no side effects, creates no resources, executes no code, modifies nothing, and incurs no financial obligation. The server is explicitly described as 'read-only', and listing audit events is a read operation.
From the tool's definition Tool name contains 'list' and description states it 'Lists recent Access Denied or Unauthorized events from CloudTrail' — a query operation that retrieves audit log data without modification.
Attacks that exploit this kind of access
Lists recent Access Denied or Unauthorized events from CloudTrail. It is categorised as a Read tool in the AWS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AWS MCP Server MCP server in PolicyLayer and add a rule for list_access_denied_events: 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 MCP Server. Nothing to install.
list_access_denied_events 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_access_denied_events 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_access_denied_events. 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_access_denied_events is provided by the AWS MCP Server MCP server (sergiosediq/aws-mcp-server). 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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