AI agents use create_bucket to create or update resources in Recall MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Recall MCP Server environment.
Creating a bucket is a reversible write operation that adds a new container for object storage. It modifies the account's state by adding a new resource, but does not delete data, execute arbitrary code, or commit financial transactions (credit purchase is separate via 'buy_credit').
From the tool's definition Tool name 'create_bucket' and description 'Create a new bucket in Recall' indicate this tool creates a new resource in the blockchain storage system.
Documented attack patterns abuse exactly the kind of access create_bucket gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Recall MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_bucket:
{
"version": "1",
"default": "deny",
"tools": {
"create_bucket": {
"limits": [
{
"counter": "create_bucket_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_bucket 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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Create a new bucket in Recall. It is categorised as a Write tool in the Recall MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Recall MCP Server MCP server in PolicyLayer and add a rule for create_bucket: 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 Recall MCP Server. Nothing to install.
create_bucket 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 create_bucket 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 create_bucket. 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.
create_bucket is provided by the Recall MCP Server MCP server (recallnet/recall-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Recall MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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9 Recall MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.