List all messages (comments) for the activity
AI agents call listActivityMessages to retrieve information from Intervals Icu Api without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
id | string | Yes | |
limit | number | — | |
sinceId | number | — |
Parameters from the server's own tool schema.
This tool retrieves and queries existing messages/comments associated with an activity. It performs a read-only operation with no capability to create, modify, delete, or execute external actions. The blast radius of misuse is minimal—an agent could access activity comments but cannot alter data or trigger operations.
From the tool's definition Tool name is 'listActivityMessages' and description states 'List all messages (comments) for the activity'. The verb 'List' indicates data retrieval with no modification or side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all messages (comments) for the activity. It is categorised as a Read tool in the Intervals Icu Api MCP Server, which means it retrieves data without modifying state.
listActivityMessages accepts 3 parameters: id, limit, sinceId. Required: id. The full parameter table on this page comes from the server's own tool schema.
Register the Intervals Icu Api MCP server in PolicyLayer and add a rule for listActivityMessages: 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.
listActivityMessages is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the listActivityMessages 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.
Set action: deny in the PolicyLayer policy for listActivityMessages. 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.
listActivityMessages 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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