updateActivityStreams · Intervals Icu Api MCP: Risk & Policy

WHAT IT DOES

What updateActivityStreams does on Intervals Icu Api

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

PARAMETERS

Parameter	Type	Required	Description
`id`	string	Yes

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why updateActivityStreams needs a policy

This tool modifies activity stream records, which are core training/fitness data in Intervals.icu. The update operation is reversible (can be changed later), making it Write rather than Destructive. However, the severity is high because corrupting or maliciously modifying activity stream data could undermine the integrity of an athlete's training log and analytics.

From the tool's definition Tool name 'updateActivityStreams' and description 'Update streams for the activity from JSON' indicate modification of existing activity stream data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

updateActivityStreams Rate-limited

updateActivityStreams 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": {
    "updateActivityStreams": {
      "limits": [
        {
          "counter": "updateactivitystreams_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 Intervals Icu Api, so you can run agents against it safely.

FAQ

Questions about updateActivityStreams

What does the updateActivityStreams tool do? +

Update streams for the activity from JSON. It is categorised as a Write tool in the Intervals Icu Api MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does updateActivityStreams accept? +

updateActivityStreams accepts 1 parameter: id. Required: id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on updateActivityStreams? +

Register the Intervals Icu Api MCP server in PolicyLayer and add a rule for updateActivityStreams: 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 Intervals Icu Api. Nothing to install.

What risk level is updateActivityStreams? +

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

Can I rate-limit updateActivityStreams? +

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

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

updateActivityStreams is provided by the Intervals Icu Api MCP server (intervals-icu-api-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.