Advanced search with hybrid BM25+vector similarity, query expansion, and re-ranking
AI agents call search_magma_advanced to retrieve information from MCP MAGMA Handbook Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries data from the MAGMA handbook using semantic search capabilities. It returns documentation, code examples, and explanations in response to natural language queries. No data is created, modified, deleted, or executed—only searched and returned. This is a classic Read operation with minimal risk if misused.
From the tool's definition Tool performs 'Advanced search with hybrid BM25+vector similarity, query expansion, and re-ranking' on handbook documentation. Search and query operations are inherently read-only with no side effects.
Attacks that exploit this kind of access
Advanced search with hybrid BM25+vector similarity, query expansion, and re-ranking. It is categorised as a Read tool in the MCP MAGMA Handbook Server MCP Server, which means it retrieves data without modifying state.
Register the MCP MAGMA Handbook Server MCP server in PolicyLayer and add a rule for search_magma_advanced: 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 MCP MAGMA Handbook Server. Nothing to install.
search_magma_advanced 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 search_magma_advanced 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 search_magma_advanced. 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.
search_magma_advanced is provided by the MCP MAGMA Handbook Server MCP server (legenai/mcp-magma-handbook). 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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