KendraListIndexesTool
AI agents call KendraListIndexesTool to retrieve information from Amazon SageMaker AI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'List' verb in the tool name indicates this retrieves or queries data without modification. Listing indexes is a read operation that returns metadata about existing Kendra indexes. The empty description lowers confidence slightly, but the naming convention is clear. No data is modified, deleted, or executed.
From the tool's definition Tool name 'KendraListIndexesTool' contains 'List' which indicates a retrieval operation. The tool is from Amazon Kendra (AWS search service) and lists indexes, which are read-only queries with no side effects.
Attacks that exploit this kind of access
KendraListIndexesTool. It is categorised as a Read tool in the Amazon SageMaker AI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon SageMaker AI MCP Server MCP server in PolicyLayer and add a rule for KendraListIndexesTool: 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 Amazon SageMaker AI MCP Server. Nothing to install.
KendraListIndexesTool 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 KendraListIndexesTool 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 KendraListIndexesTool. 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.
KendraListIndexesTool is provided by the Amazon SageMaker AI MCP Server MCP server (awslabs.sagemaker-ai-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.