Find Lambda functions with low invocation rates or high error rates.
AI agents call find_underutilized_lambda_functions to retrieve information from AWS FinOps 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 analyzes performance metrics from AWS Lambda functions to identify optimization opportunities. It performs a read-only query operation that examines invocation rates and error rates—observational data gathering with no side effects on infrastructure, configuration, or data.
From the tool's definition Tool name 'find_underutilized_lambda_functions' and description 'Find Lambda functions with low invocation rates or high error rates' indicate querying/analyzing existing Lambda metrics without creating, modifying, or deleting resources.
Attacks that exploit this kind of access
Find Lambda functions with low invocation rates or high error rates. It is categorised as a Read tool in the AWS FinOps MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AWS FinOps MCP Server MCP server in PolicyLayer and add a rule for find_underutilized_lambda_functions: 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 FinOps MCP Server. Nothing to install.
find_underutilized_lambda_functions 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 find_underutilized_lambda_functions 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 find_underutilized_lambda_functions. 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.
find_underutilized_lambda_functions is provided by the AWS FinOps MCP Server MCP server (prashantgupta123/aws-pillar-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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