updateCustomItemImage · Intervals Icu Api MCP: Risk & Policy

WHAT IT DOES

What updateCustomItemImage does on Intervals Icu Api

AI agents use updateCustomItemImage 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
`id`	string	Yes
`file`	string	Yes
`itemId`	number	Yes

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why updateCustomItemImage needs a policy

Uploading an image modifies data reversibly; the image can be replaced or deleted later. This is a Write operation, not Destructive (not irreversible) or Execute (not arbitrary code/commands). Severity is medium because unauthorized image uploads could deface user data or consume storage, but the operation is scoped to a single custom item and reversible.

From the tool's definition Tool description states "Upload a new image for a custom item" — this creates or modifies an image asset associated with a custom item.

Risk signalsAccepts file system path (file)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

updateCustomItemImage Rate-limited

updateCustomItemImage 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": {
    "updateCustomItemImage": {
      "limits": [
        {
          "counter": "updatecustomitemimage_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 updateCustomItemImage

What does the updateCustomItemImage tool do? +

Upload a new image for a custom item as multipart/form-data. 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 updateCustomItemImage accept? +

updateCustomItemImage accepts 3 parameters: id, file, itemId. Required: id, file, itemId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on updateCustomItemImage? +

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

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

Can I rate-limit updateCustomItemImage? +

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

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

updateCustomItemImage 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.