Get the root SharePoint site for the tenant
AI agents call get_root_site to retrieve information from Microsoft Graph MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about the root SharePoint site. The verb 'Get' and the read-only nature of querying site metadata place it in the Read category. There are no side effects, data modifications, or destructive operations. Severity is low because retrieving site metadata poses minimal risk even if accessed by an unauthorized agent.
From the tool's definition Tool name 'get_root_site' and description 'Get the root SharePoint site for the tenant' indicate a retrieval operation with no modification, creation, or deletion of data.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
Get the root SharePoint site for the tenant. It is categorised as a Read tool in the Microsoft Graph MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Microsoft Graph MCP Server MCP server in PolicyLayer and add a rule for get_root_site: 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 Microsoft Graph MCP Server. Nothing to install.
get_root_site 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 get_root_site 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 get_root_site. 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.
get_root_site is provided by the Microsoft Graph MCP Server MCP server (ry-ops/microsoft-graph-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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