List Zulip streams. By default returns only subscribed streams. Can also return all public streams.
AI agents call zulip_list_streams 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 a list of available Zulip streams without creating, modifying, or deleting any data. It is a straightforward query operation with no destructive or irreversible consequences. The ability to filter between subscribed and public streams does not change its fundamental nature as a read-only operation.
From the tool's definition Tool name 'zulip_list_streams' and description 'List Zulip streams' indicates data retrieval with no side effects. Returns subscribed or public streams—purely informational operations.
Attacks that exploit this kind of access
List Zulip streams. By default returns only subscribed streams. Can also return all public streams. 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_streams: 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_streams 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_streams 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_streams. 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_streams 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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