Creates a new custom object in your workspace. Required scopes: \
AI agents use postv2objects 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 a new custom object, which is a reversible write operation. It does not delete or overwrite existing data, nor does it execute code or involve financial transactions. Severity is medium as creating unwanted custom objects could clutter the workspace and require manual cleanup, but is not irreversible.
From the tool's definition Creates a new custom object in your workspace
Documented attack patterns abuse exactly the kind of access postv2objects 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 postv2objects:
{
"version": "1",
"default": "deny",
"tools": {
"postv2objects": {
"limits": [
{
"counter": "postv2objects_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}postv2objects 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.
Creates a new custom object in your workspace. Required scopes: \. 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 postv2objects: 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.
postv2objects 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 postv2objects 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 postv2objects. 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.
postv2objects 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.