List all users (members) in the Zulip organization. Optionally filter to active-only or exclude bots.
AI agents call zulip_list_users to retrieve information from Zulip MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries user membership data from the Zulip organization without creating, modifying, deleting, or executing any actions. It is purely informational and has no blast radius beyond information disclosure, which is inherent to read operations. Low severity reflects the public nature of user directory information within an organization's communication platform.
From the tool's definition Tool name 'zulip_list_users' and description 'List all users (members) in the Zulip organization' indicate a retrieval operation with no side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all users (members) in the Zulip organization. Optionally filter to active-only or exclude bots. It is categorised as a Read tool in the Zulip MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Zulip MCP Server MCP server in PolicyLayer and add a rule for zulip_list_users: 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 Zulip MCP Server. Nothing to install.
zulip_list_users 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 zulip_list_users 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 zulip_list_users. 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.
zulip_list_users is provided by the Zulip MCP Server MCP server (prixite/zulip-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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