List SharePoint sites in the tenant. Optionally search by name.
AI agents call list_sites 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 queries and retrieves existing SharePoint site data without modifying, deleting, or executing operations. It returns a list of sites optionally filtered by name search. The blast radius of misuse is minimal—an agent querying sites gains visibility into tenant structure but cannot change state or access data, making this a standard Read category tool with low severity.
From the tool's definition Tool performs a 'List' operation that 'retrieves' SharePoint sites with optional search filtering. The description uses 'List' which is a standard read-only query pattern.
Attacks that exploit this kind of access
List SharePoint sites in the tenant. Optionally search by name. 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 list_sites: 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.
list_sites 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_sites 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_sites. 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_sites 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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