teams_upload · Outpost MCP: Risk & Policy

WHAT IT DOES

What teams_upload does on Outpost

AI agents use teams_upload to create or update resources in Outpost — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Outpost environment.

WHY IT NEEDS A POLICY

Why teams_upload needs a policy

Upload operations create or add new data to a system (Teams workspace/conversations) reversibly. This is a Write operation rather than Execute because it doesn't run arbitrary code or scripts—it transfers a file to a destination.

From the tool's definition Tool name 'teams_upload' strongly implies file upload to Microsoft Teams; description is empty, providing no additional justification details.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

teams_upload Rate-limited

teams_upload stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "teams_upload": {
      "limits": [
        {
          "counter": "teams_upload_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Outpost, so you can run agents against it safely.

FAQ

Questions about teams_upload

What does the teams_upload tool do? +

teams_upload. It is categorised as a Write tool in the Outpost MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on teams_upload? +

Register the Outpost MCP server in PolicyLayer and add a rule for teams_upload: 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 Outpost. Nothing to install.

What risk level is teams_upload? +

teams_upload is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit teams_upload? +

Yes. Add a rate_limit block to the teams_upload 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 teams_upload completely? +

Set action: deny in the PolicyLayer policy for teams_upload. 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 teams_upload? +

teams_upload is provided by the Outpost MCP server (signalclaude/outpost). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.