QueryKnowledgeBases
AI agents call QueryKnowledgeBases to retrieve information from AWS IoT SiteWise MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name indicates a query operation that retrieves information from knowledge bases without modifying them. This is typically a read-only operation. Severity is medium rather than low because knowledge bases may contain sensitive information or operational details whose exposure could inform further attacks, though the tool itself performs no destructive or side-effect actions.
From the tool's definition Tool name 'QueryKnowledgeBases' suggests retrieving or querying data from knowledge bases. The description is empty, limiting confidence.
Attacks that exploit this kind of access
QueryKnowledgeBases. It is categorised as a Read tool in the AWS IoT SiteWise MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AWS IoT SiteWise MCP Server MCP server in PolicyLayer and add a rule for QueryKnowledgeBases: 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 IoT SiteWise MCP Server. Nothing to install.
QueryKnowledgeBases 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 QueryKnowledgeBases 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 QueryKnowledgeBases. 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.
QueryKnowledgeBases is provided by the AWS IoT SiteWise MCP Server MCP server (awslabs.aws-iot-sitewise-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.