Append a journal entry with full security gating (RBAC journal:write + AAL R2 + audit).
AI agents use journal_write_secure to create or update resources in Celiums Memory — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Celiums Memory environment.
This tool modifies persistent user memory by appending journal entries. While it is protected by role-based access control, authentication assurance level R2, and audit logging, these are defensive measures that do not change the fundamental nature of the operation. The blast radius is limited by the gating mechanisms and the reversibility of appending data, making it a Write rather than Destructive.
From the tool's definition Tool name 'journal_write_secure' and description 'Append a journal entry' indicate creation/modification of data.
Documented attack patterns abuse exactly the kind of access journal_write_secure gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Celiums Memory, and nothing reaches the server without passing your rules. This is the rule we recommend for journal_write_secure:
{
"version": "1",
"default": "deny",
"tools": {
"journal_write_secure": {
"limits": [
{
"counter": "journal_write_secure_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}journal_write_secure 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.
Append a journal entry with full security gating (RBAC journal:write + AAL R2 + audit). It is categorised as a Write tool in the Celiums Memory MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Celiums Memory MCP server in PolicyLayer and add a rule for journal_write_secure: 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 Celiums Memory. Nothing to install.
journal_write_secure 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 journal_write_secure 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 journal_write_secure. 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.
journal_write_secure is provided by the Celiums Memory MCP server (terrizoaguimor/celiums-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Celiums Memory, 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.
62 Celiums Memory tools catalogued and risk-classified — across an index of 43,000+ MCP servers.