Activate Graph API tools for a resource category. Call this as soon as the user
AI agents call load_category to retrieve information from Ms Graph Dev without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to be a helper that loads available operations within a category (users, files, mail, etc.) rather than performing actual API calls or data operations. It reads/queries available tools without side effects. The incomplete description ('Call this as soon as the user') slightly reduces confidence, but the clear "Activate" and "load" language indicates a read-only tool activation pattern.
From the tool's definition Tool activates/loads Graph API tools for a resource category based on the description 'Activate Graph API tools for a resource category.' This is a categorical lookup or initialization operation that retrieves tool definitions on-demand, not executing graph…
Attacks that exploit this kind of access
Activate Graph API tools for a resource category. Call this as soon as the user. It is categorised as a Read tool in the Ms Graph Dev MCP Server, which means it retrieves data without modifying state.
Register the Ms Graph Dev MCP server in PolicyLayer and add a rule for load_category: 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 Ms Graph Dev. Nothing to install.
load_category 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 load_category 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 load_category. 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.
load_category is provided by the Ms Graph Dev MCP server (stubbedev/ms-graph-dev-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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