sendActivityMessage · Intervals Icu Api MCP: Risk & Policy

WHAT IT DOES

What sendActivityMessage does on Intervals Icu Api

AI agents use sendActivityMessage 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
`content`	string	—

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why sendActivityMessage needs a policy

This is a Write operation because it creates or adds reversible data (a comment) to an existing activity record. It does not read-only, does not execute external commands, is not destructive (comments can be deleted), and is not financial.

From the tool's definition Tool adds a message (comment) to an activity, which creates new data (a comment/message) that persists in the system. The description states 'Add a message (comment)' which indicates creation of new content.

Risk signalsAccepts raw HTML/template content (content)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sendActivityMessage Rate-limited

sendActivityMessage 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": {
    "sendActivityMessage": {
      "limits": [
        {
          "counter": "sendactivitymessage_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 sendActivityMessage

What does the sendActivityMessage tool do? +

Add a message (comment) to an activity. 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 sendActivityMessage accept? +

sendActivityMessage accepts 2 parameters: id, content. Required: id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on sendActivityMessage? +

Register the Intervals Icu Api MCP server in PolicyLayer and add a rule for sendActivityMessage: 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 sendActivityMessage? +

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

Can I rate-limit sendActivityMessage? +

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

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

sendActivityMessage 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.