hybrid_search
Search using combined semantic, lexical, and metadata signals. Provides better recall than single-signal search by fusing multiple relevance signals.
This record as markdown: /tools/danielsimonjr-memory-mcp/hybrid-search.md
What hybrid_search does on Enhanced Knowledge Graph Memory Server
AI agents call hybrid_search to retrieve information from Enhanced Knowledge Graph Memory Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why hybrid_search is rated Low
This tool performs search across a knowledge graph memory store using multiple relevance signals (semantic, lexical, metadata). It retrieves and ranks information but does not create, modify, delete, or execute any operations. The search function is read-only with no side effects.
From the tool's definition Tool name 'hybrid_search' and description 'Search using combined semantic, lexical, and metadata signals' indicates a retrieval/query operation with no data modification, deletion, or execution of external code.
Attacks that exploit this kind of access
The rule that runs hybrid_search safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Enhanced Knowledge Graph Memory Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For hybrid_search, this is the rule to start with:
hybrid_search is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Enhanced Knowledge Graph Memory Server, apply this rule, and every hybrid_search call is checked against it from then on.
Questions about hybrid_search
Search using combined semantic, lexical, and metadata signals. Provides better recall than single-signal search by fusing multiple relevance signals. It is categorised as a Read tool in the Enhanced Knowledge Graph Memory Server MCP Server, which means it retrieves data without modifying state.
Register the Enhanced Knowledge Graph Memory 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 Enhanced Knowledge Graph Memory 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 Enhanced Knowledge Graph Memory Server MCP server (danielsimonjr/memory-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Enhanced Knowledge Graph Memory Server, and thousands of servers like it.
Across the catalogue