Lists CloudWatch alarms, optionally filtering by state.
AI agents call list_cloudwatch_alarms 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 CloudWatch alarm metadata without side effects. Listing alarms provides observability data about monitoring configurations but does not modify infrastructure, execute operations, or commit financial changes. The blast radius of misuse is minimal—an agent could learn about alarm configurations but cannot alter them or trigger actions.
From the tool's definition Tool name 'list_cloudwatch_alarms' and description 'Lists CloudWatch alarms, optionally filtering by state' indicate a query/retrieval operation with no modification or deletion.
Attacks that exploit this kind of access
Lists CloudWatch alarms, optionally filtering by state. 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_cloudwatch_alarms: 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_cloudwatch_alarms 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_cloudwatch_alarms 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_cloudwatch_alarms. 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_cloudwatch_alarms 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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