AI agents call niahub_search_pack to retrieve information from Niahub without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a search operation on indexed knowledge packs, which is fundamentally a data retrieval action with no side effects. No data is created, modified, deleted, or executed. The sibling tools (niahub_retrieve_context, niahub_save_context) suggest this is a knowledge lookup system. Search is a classic Read operation with minimal blast radius if misused by an agent.
From the tool's definition Tool is named 'niahub_search_pack' and described as 'Search this NiaHub pack' — it retrieves and queries pre-indexed knowledge data without modifying or deleting content.
Attacks that exploit this kind of access
Search this NiaHub pack. It is categorised as a Read tool in the Niahub MCP Server, which means it retrieves data without modifying state.
Register the Niahub MCP server in PolicyLayer and add a rule for niahub_search_pack: 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 Niahub. Nothing to install.
niahub_search_pack 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 niahub_search_pack 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 niahub_search_pack. 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.
niahub_search_pack is provided by the Niahub MCP server (kush614/niahub). 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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