List all topics in a stream
AI agents call zulip_get_stream_topics 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 topics within a Zulip stream. It is a simple data retrieval operation with no side effects, no data modification, and no ability to delete or execute code. The blast radius is minimal—an agent listing topics in a stream cannot cause damage beyond information disclosure of topic names, which are typically non-sensitive organizational metadata.
From the tool's definition Tool name 'zulip_get_stream_topics' and description 'List all topics in a stream' indicate a read-only query operation that retrieves existing data without modification, deletion, or code execution.
Attacks that exploit this kind of access
List all topics in a stream. 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_get_stream_topics: 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_get_stream_topics 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_get_stream_topics 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_get_stream_topics. 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_get_stream_topics 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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