add_endpoint · Otel MCP: Risk & Policy

WHAT IT DOES

What add_endpoint does on Otel

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

WHY IT NEEDS A POLICY

Why add_endpoint needs a policy

This tool creates or registers a new OTLP endpoint configuration, which is a reversible Write operation. It modifies the server's state by adding a new endpoint for telemetry data routing. Severity is medium because misconfiguration could misdirect logs/traces/metrics to unintended destinations, but the effect is reversible via 'remove_endpoint'.

From the tool's definition Tool name 'add_endpoint' combined with server context indicating management of OTLP endpoints. The 'add_' prefix indicates creation/registration of a new endpoint.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_endpoint Rate-limited

add_endpoint 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": {
    "add_endpoint": {
      "limits": [
        {
          "counter": "add_endpoint_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about add_endpoint

What does the add_endpoint tool do? +

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

How do I enforce a policy on add_endpoint? +

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

What risk level is add_endpoint? +

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

Can I rate-limit add_endpoint? +

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

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

add_endpoint is provided by the Otel MCP server (probsjustin/otel_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.