Use this endpoint to update list entries by \
AI agents use putv2listsentriesbyentryid 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 list entries reversibly through an update operation. It does not delete data (unlike its destructive sibling), does not execute arbitrary operations, and does not involve financial transactions. The severity is medium because unintended updates to list data could require manual correction but are recoverable. Confidence is high due to clear REST API semantics (PUT = update).
From the tool's definition Tool name "putv2listsentriesbyentryid" uses PUT HTTP method and "update" language in the description, indicating modification of existing data.
Documented attack patterns abuse exactly the kind of access putv2listsentriesbyentryid 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 putv2listsentriesbyentryid:
{
"version": "1",
"default": "deny",
"tools": {
"putv2listsentriesbyentryid": {
"limits": [
{
"counter": "putv2listsentriesbyentryid_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}putv2listsentriesbyentryid 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 update list entries by \. 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 putv2listsentriesbyentryid: 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.
putv2listsentriesbyentryid 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 putv2listsentriesbyentryid 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 putv2listsentriesbyentryid. 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.
putv2listsentriesbyentryid 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.
Free to start. No card required.
57 Attio tools catalogued and risk-classified — across an index of 43,000+ MCP servers.