Track incremental changes to Microsoft Graph resources using delta queries for efficient synchronization.
AI agents call execute_delta_query to retrieve information from Microsoft 365 Core MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Delta queries are a read/query mechanism that retrieves incremental changes to resources without modifying them. However, the severity is medium because it provides access to potentially sensitive data across a wide range of Microsoft 365 resources (Teams, SharePoint, Exchange, Azure AD, etc.), and misuse could expose confidential organizational data at scale.
From the tool's definition Track incremental changes to Microsoft Graph resources using delta queries for efficient synchronization
Attacks that exploit this kind of access
Track incremental changes to Microsoft Graph resources using delta queries for efficient synchronization. It is categorised as a Read tool in the Microsoft 365 Core MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Microsoft 365 Core MCP Server MCP server in PolicyLayer and add a rule for execute_delta_query: 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 365 Core MCP Server. Nothing to install.
execute_delta_query 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 execute_delta_query 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 execute_delta_query. 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.
execute_delta_query is provided by the Microsoft 365 Core MCP Server MCP server (roycedamien/m365-core-mcp). 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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