KendraListIndexesTool
AI agents call KendraListIndexesTool to retrieve information from Amazon MQ MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name strongly suggests listing Kendra indexes, a data retrieval operation with no side effects. Despite the empty description limiting certainty, the semantic meaning of 'List' in AWS APIs consistently maps to Read operations that query existing resources without modification or deletion.
From the tool's definition Tool name 'KendraListIndexesTool' indicates a list operation, which retrieves data without modification. The 'List' verb is characteristic of Read operations. However, the tool description is empty, which reduces confidence.
Attacks that exploit this kind of access
KendraListIndexesTool. It is categorised as a Read tool in the Amazon MQ MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon MQ 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 MQ 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 MQ MCP Server MCP server (awslabs.amazon-mq-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.