Search across Microsoft 365 data including emails, files, Teams chats, calendar events, and external connectors. Large result sets are saved to a local temp file — use the returned file_path with your file-reading tool to access the full results.
AI agents call search to retrieve information from M365connector 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 retrieval tool that queries and searches existing data without side effects. While it can access sensitive data (emails, chats, calendar events), the actual risk depends on access controls and data sensitivity policies, warranting 'medium' severity. High confidence due to explicit 'Search' language and read-only nature.
From the tool's definition Tool performs search operations across Microsoft 365 data (emails, files, Teams chats, calendar events) with results returned via file paths for reading. No creation, modification, deletion, or financial operations are described.
Attacks that exploit this kind of access
Search across Microsoft 365 data including emails, files, Teams chats, calendar events, and external connectors. Large result sets are saved to a local temp file — use the returned file_path with your file-reading tool to access the full results. It is categorised as a Read tool in the M365connector MCP Server, which means it retrieves data without modifying state.
Register the M365connector MCP server in PolicyLayer and add a rule for 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 M365connector. Nothing to install.
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 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 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.
search is provided by the M365connector MCP server (m365connector). 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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