Advanced search with filters
AI agents call smart-search to retrieve information from Yarr Media Stack without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool is described as a search function with filters, which is a read/query operation. No indication of side effects, data modification, or destructive actions. Lower confidence due to vague description; 'advanced' filters could theoretically trigger actions, but 'search' strongly implies read-only behavior.
From the tool's definition 'Advanced search with filters' — the tool performs a search operation with filtering capabilities
Attacks that exploit this kind of access
Advanced search with filters. It is categorised as a Read tool in the Yarr Media Stack MCP Server, which means it retrieves data without modifying state.
Register the Yarr Media Stack MCP server in PolicyLayer and add a rule for smart-search: 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 Yarr Media Stack. Nothing to install.
smart-search 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 smart-search 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 smart-search. 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.
smart-search is provided by the Yarr Media Stack MCP server (mcpnexus-registry/yarr). 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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