AI agents call niahub_retrieve_context 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.
This tool only reads previously stored context data from memory. There is no creation, modification, deletion, code execution, or financial impact. It is a straightforward read operation similar to a cache or session store lookup. The low severity reflects minimal risk even if misused by an AI agent, as retrieval alone cannot corrupt or destroy data.
From the tool's definition Tool name includes 'retrieve' and description states 'Retrieve a value from cross-session memory' — both indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Retrieve a value from cross-session memory. 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_retrieve_context: 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_retrieve_context 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_retrieve_context 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_retrieve_context. 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_retrieve_context 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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