get-free-busy · Outlook MCP Server MCP: Risk & Policy

WHAT IT DOES

What get-free-busy does on Outlook MCP Server

AI agents call get-free-busy to retrieve information from Outlook MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get-free-busy needs a policy

This tool performs data retrieval of free/busy calendar information, which is characteristic of a Read operation. It has no side effects, does not modify data, execute code, delete information, or involve financial transactions. The blast radius is low as misuse would only expose scheduling information without enabling destructive or harmful actions.

From the tool's definition The tool 'get-free-busy' retrieves schedule information, as indicated by 'Gets free/busy schedule information.' This is a read-only operation that queries availability data without modifying, executing external commands, or affecting financial systems.

Attacks that exploit this kind of access

Questions about get-free-busy

What does the get-free-busy tool do? +

Gets free/busy schedule information for one or more people. It is categorised as a Read tool in the Outlook MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-free-busy? +

Register the Outlook MCP Server MCP server in PolicyLayer and add a rule for get-free-busy: 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 Outlook MCP Server. Nothing to install.

What risk level is get-free-busy? +

get-free-busy is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get-free-busy? +

Yes. Add a rate_limit block to the get-free-busy 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.

How do I block get-free-busy completely? +

Set action: deny in the PolicyLayer policy for get-free-busy. 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.

What MCP server provides get-free-busy? +

get-free-busy is provided by the Outlook MCP Server MCP server (peacockery-studio/outlook-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.