get_team_channels

THE RISK

Low Risk

Why get_team_channels needs a policy

The tool queries metadata about Teams channels and returns structured information. There are no side effects, no data modification, no code execution, and no resource deletion. The action is informational only, making it a straightforward Read category tool.

From the tool's definition Tool description states 'Get channels for a specific Team' and 'Returns: Array of channel objects' — it retrieves and lists data without modification, matching the pattern of a read/query operation.

Documented attack patterns abuse exactly the kind of access get_team_channels gives an agent:

POLICY

How to control get_team_channels

PolicyLayer is an MCP gateway — it sits between your AI agents and Microsoft Graph MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_team_channels:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_team_channels": {}
  }
}

get_team_channels is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Microsoft Graph MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_team_channels

What does the get_team_channels tool do? +

Get channels for a specific Team. WORKFLOW: team_id comes from get_teams tool output. Returns: Array of channel objects with id, displayName, and channel_type. It is categorised as a Read tool in the Microsoft Graph MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_team_channels? +

Register the Microsoft Graph MCP Server MCP server in PolicyLayer and add a rule for get_team_channels: 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 Graph MCP Server. Nothing to install.

What risk level is get_team_channels? +

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

Can I rate-limit get_team_channels? +

Yes. Add a rate_limit block to the get_team_channels 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_team_channels completely? +

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

get_team_channels is provided by the Microsoft Graph MCP Server MCP server (marlonluo2018/microsoft_graph_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Microsoft Graph MCP Server tool call.

Start from Microsoft Graph MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →