Update existing items in a list. Use get_list_items to find item IDs. Important: if an item has a code value, you must include the code field in the update or Anaplan returns an error.
AI agents use update_list_items to create or update resources in Anaplan MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Anaplan MCP environment.
This tool creates or modifies data reversibly by updating list items in Anaplan. Updates can typically be undone through subsequent updates or rollback mechanisms, distinguishing it from destructive operations. The 'high' severity reflects the potential business impact of incorrect bulk list item modifications in a financial planning platform like Anaplan, though the operation remains reversible.
From the tool's definition Tool name is 'update_list_items' and description states 'Update existing items in a list', which modifies existing data. The requirement to specify code fields and interaction with Anaplan's data model indicates structured data modification.
Documented attack patterns abuse exactly the kind of access update_list_items gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Anaplan MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for update_list_items:
{
"version": "1",
"default": "deny",
"tools": {
"update_list_items": {
"limits": [
{
"counter": "update_list_items_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_list_items 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.
Free to start. No card required.
Update existing items in a list. Use get_list_items to find item IDs. Important: if an item has a code value, you must include the code field in the update or Anaplan returns an error. It is categorised as a Write tool in the Anaplan MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Anaplan MCP server in PolicyLayer and add a rule for update_list_items: 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 Anaplan MCP. Nothing to install.
update_list_items is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_list_items 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 update_list_items. 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.
update_list_items is provided by the Anaplan MCP server (larasrinath/anaplan-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Anaplan MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
70 Anaplan MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.