Lists Lambda functions with runtimes and last modified dates.
AI agents call list_lambda_functions 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 and queries AWS Lambda function metadata without creating, modifying, deleting, or executing any functions. It has no side effects and represents standard read-only infrastructure introspection. Blast radius is minimal — an AI agent listing Lambda functions cannot cause operational damage.
From the tool's definition Tool name is 'list_lambda_functions' and description states it 'Lists Lambda functions' — a retrieval operation with no modification or deletion. Server is described as 'read-only' and tool provides metadata (runtimes, last modified dates) only.
Attacks that exploit this kind of access
Lists Lambda functions with runtimes and last modified dates. 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_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 MCP Server. Nothing to install.
list_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 list_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 list_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.
list_lambda_functions 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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