Search through ${totalCount} tools (${toolsRegistry.size} Microsoft Graph API operations + ${utilityTools.length} server utilities like download-bytes). Ranks results by BM25 over tool name, llmTip, description, and path. After picking a tool, call get-tool-schema for parameters, then execute-tool.
AI agents call search-tools to retrieve information from Ms 365 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only tool that searches and ranks tools in a registry using information retrieval (BM25 ranking). It retrieves metadata about available Graph API operations and utilities but does not execute them, modify data, or trigger external operations.
From the tool's definition Tool description explicitly states 'Search through ${totalCount} tools' and 'Ranks results by BM25' — this is a search/query operation that retrieves information about available tools.
Attacks that exploit this kind of access
Search through ${totalCount} tools (${toolsRegistry.size} Microsoft Graph API operations + ${utilityTools.length} server utilities like download-bytes). Ranks results by BM25 over tool name, llmTip, description, and path. After picking a tool, call get-tool-schema for parameters, then execute-tool. It is categorised as a Read tool in the Ms 365 MCP Server, which means it retrieves data without modifying state.
Register the Ms 365 MCP server in PolicyLayer and add a rule for search-tools: 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 Ms 365. Nothing to install.
search-tools 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-tools 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-tools. 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-tools is provided by the Ms 365 MCP server (@softeria/ms-365-mcp-server). 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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