Perform hybrid search combining semantic vector search with keyword search using BM25. This provides better results by combining the strengths of both approaches. The collection must be created with enableHybrid set to true.
AI agents call hybrid_search to retrieve information from Qdrant MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
hybrid_search is a retrieval operation that queries a vector database and returns results based on search criteria. It does not create, modify, or delete data; it does not execute code or external commands; and it does not involve financial transactions. This is a canonical Read operation. Severity is low because misuse would at worst return unintended search results with no destructive consequences.
From the tool's definition Tool performs 'hybrid search combining semantic vector search with keyword search' — a query operation with no side effects.
Documented attack patterns abuse exactly the kind of access hybrid_search gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Qdrant MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for hybrid_search:
{
"version": "1",
"default": "deny",
"tools": {
"hybrid_search": {}
}
}hybrid_search is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Perform hybrid search combining semantic vector search with keyword search using BM25. This provides better results by combining the strengths of both approaches. The collection must be created with enableHybrid set to true. It is categorised as a Read tool in the Qdrant MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Qdrant MCP Server MCP server in PolicyLayer and add a rule for hybrid_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 Qdrant MCP Server. Nothing to install.
hybrid_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 hybrid_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 hybrid_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.
hybrid_search is provided by the Qdrant MCP Server MCP server (mhalder/qdrant-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Qdrant MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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20 Qdrant MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.