account_create_implicit_account
AI agents use account_create_implicit_account to create or update resources in NEAR MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your NEAR MCP environment.
Based on the name, this tool likely creates an implicit NEAR blockchain account (derived from a public key). Account creation is a Write operation as it creates new data on-chain. However, the empty description lowers confidence.
From the tool's definition Tool name: account_create_implicit_account; description is empty
Documented attack patterns abuse exactly the kind of access account_create_implicit_account gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and NEAR MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for account_create_implicit_account:
{
"version": "1",
"default": "deny",
"tools": {
"account_create_implicit_account": {
"limits": [
{
"counter": "account_create_implicit_account_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}account_create_implicit_account 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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account_create_implicit_account. It is categorised as a Write tool in the NEAR MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the NEAR MCP server in PolicyLayer and add a rule for account_create_implicit_account: 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 NEAR MCP. Nothing to install.
account_create_implicit_account 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 account_create_implicit_account 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 account_create_implicit_account. 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.
account_create_implicit_account is provided by the NEAR MCP server (nearai/near-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from NEAR MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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23 NEAR MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.