Creates a new comment related to an existing thread, record or entry. To create comments on records, you will need the \
AI agents use postv2comments 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 creates new comments, which is a reversible write operation. It modifies data by adding content but does not delete, execute arbitrary code, or move financial resources. The severity is medium because comment creation could potentially spam, pollute records, or create inappropriate content, but the blast radius is limited to comment data and can be undone via deletion tools like deletev2commentsbycommentid.
From the tool's definition Tool name contains 'post' and description states 'Creates a new comment related to an existing thread, record or entry.' The verb 'Creates' indicates a data creation operation.
Documented attack patterns abuse exactly the kind of access postv2comments 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 postv2comments:
{
"version": "1",
"default": "deny",
"tools": {
"postv2comments": {
"limits": [
{
"counter": "postv2comments_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}postv2comments 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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Creates a new comment related to an existing thread, record or entry. To create comments on records, you will need 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 postv2comments: 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.
postv2comments 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 postv2comments 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 postv2comments. 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.
postv2comments 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.