AI agents call list-groups to retrieve information from Keycloak without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates groups within a Keycloak realm. It is a read-only operation with no side effects, no ability to modify or delete data, and no execution of arbitrary code. The blast radius of misuse is minimal—an attacker would only gain visibility into group structure, which is typically non-sensitive organizational metadata.
From the tool's definition Tool name 'list-groups' and description 'List groups in a specific realm' indicate a query operation that retrieves group information without modifying or deleting data.
Attacks that exploit this kind of access
List groups in a specific realm. It is categorised as a Read tool in the Keycloak MCP Server, which means it retrieves data without modifying state.
Register the Keycloak MCP server in PolicyLayer and add a rule for list-groups: 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 Keycloak. Nothing to install.
list-groups 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-groups 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-groups. 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-groups is provided by the Keycloak MCP server (keycloak-mcp). 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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