Use this endpoint to create or update a list entry for a given parent record. If an entry with the specified parent record is found, that entry will be updated. If no such entry is found, a new entry will be created instead. If there are multiple entries with the same parent record, this endpoint...
AI agents use putv2listsentries to create or update resources in Attio — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Attio environment.
This tool modifies data (updates existing entries or creates new ones) reversibly. While the sibling tools include destructive operations like deleteV2* endpoints, this specific tool only creates or updates entries, making it a Write-category risk.
From the tool's definition The tool description explicitly states it is used to 'create or update a list entry' — the key verbs 'create' and 'update' indicate Write operations. The description confirms 'If an entry with the specified parent record is found, that entry will be updated.
Documented attack patterns abuse exactly the kind of access putv2listsentries gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Attio, and nothing reaches the server without passing your rules. This is the rule we recommend for putv2listsentries:
{
"version": "1",
"default": "deny",
"tools": {
"putv2listsentries": {
"limits": [
{
"counter": "putv2listsentries_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}putv2listsentries 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.
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Use this endpoint to create or update a list entry for a given parent record. If an entry with the specified parent record is found, that entry will be updated. If no such entry is found, a new entry will be created instead. If there are multiple entries with the same parent record, this endpoint with return the. It is categorised as a Write tool in the Attio MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Attio MCP server in PolicyLayer and add a rule for putv2listsentries: 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 Attio. Nothing to install.
putv2listsentries 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 putv2listsentries 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 putv2listsentries. 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.
putv2listsentries is provided by the Attio MCP server (itsbrex/attio-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Attio, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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57 Attio tools catalogued and risk-classified — across an index of 43,000+ MCP servers.