List document libraries (drives) in a SharePoint site
AI agents call list_site_drives to retrieve information from SharePoint MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and lists available document libraries within a SharePoint site. This is a read-only operation that queries metadata about site structure with no side effects, data modification, or code execution. The primary risk is information disclosure of available libraries, which is minimal since users must be authenticated and already have site access.
From the tool's definition Tool name 'list_site_drives' and description 'List document libraries (drives) in a SharePoint site' indicate retrieval/enumeration of metadata without modification or execution. This is a query operation.
Attacks that exploit this kind of access
List document libraries (drives) in a SharePoint site. It is categorised as a Read tool in the SharePoint MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SharePoint MCP Server MCP server in PolicyLayer and add a rule for list_site_drives: 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 SharePoint MCP Server. Nothing to install.
list_site_drives 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 list_site_drives 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 list_site_drives. 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.
list_site_drives is provided by the SharePoint MCP Server MCP server (sekops-ch/sharepoint-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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