list_onedrive_files
List files & folders in the user’s OneDrive — the root by default, a folder’s contents (folderId), or a name search (query). onlyFolders:true lists folders only. Paginate with pageToken (the cursor from a previous call). Read-only.
This record as markdown: /tools/hermoso/list-onedrive-files.md
What list_onedrive_files does on Hermoso
AI agents call list_onedrive_files to retrieve information from Hermoso without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why list_onedrive_files is rated Low
This tool only reads and lists OneDrive file and folder metadata. It supports pagination and filtering (by folder or name search) but does not create, modify, delete, or execute anything. The explicit 'Read-only' designation confirms its non-destructive nature. Blast radius is minimal—an AI agent could learn about file structure but cannot alter or access file contents.
From the tool's definition Tool name 'list_onedrive_files' and description explicitly state it 'List files & folders' and 'Read-only.' It retrieves or queries data with 'no side effects' per the definition.
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
The rule that runs list_onedrive_files safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_onedrive_files, this is the rule to start with:
list_onedrive_files is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every list_onedrive_files call is checked against it from then on.
Questions about list_onedrive_files
List files & folders in the user’s OneDrive — the root by default, a folder’s contents (folderId), or a name search (query). onlyFolders:true lists folders only. Paginate with pageToken (the cursor from a previous call). Read-only. It is categorised as a Read tool in the Hermoso MCP Server, which means it retrieves data without modifying state.
Register the Hermoso MCP server in PolicyLayer and add a rule for list_onedrive_files: 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 Hermoso. Nothing to install.
list_onedrive_files 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_onedrive_files 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_onedrive_files. 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_onedrive_files is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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