GetAvailableWorkspaces
AI agents call GetAvailableWorkspaces 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 'Get' verb and 'Workspaces' noun suggest a read-only query operation that retrieves workspace/broker configuration or availability information without modification. This is consistent with Read category (retrieve/query data with no side effects). Severity is medium because workspace enumeration could reveal infrastructure details useful for reconnaissance, though retrieval itself is non-destructive.
From the tool's definition Tool name 'GetAvailableWorkspaces' with verb 'Get' indicates data retrieval. Description is empty, limiting certainty. In the context of an Amazon MQ server, this likely retrieves information about available MQ workspaces/brokers.
Attacks that exploit this kind of access
GetAvailableWorkspaces. 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 GetAvailableWorkspaces: 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.
GetAvailableWorkspaces 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 GetAvailableWorkspaces 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 GetAvailableWorkspaces. 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.
GetAvailableWorkspaces 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.