Append new information to an existing entry in your second brain. Use when something has changed or been updated — preserves the original and adds the update with a timestamp. Get the entry ID from recall or list_recent first.
AI agents use append to create or update resources in Second Brain Cloudflare — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Second Brain Cloudflare environment.
This tool creates or modifies data reversibly by appending information to existing entries. It does not delete or irreversibly overwrite data (which would be Destructive), nor does it execute arbitrary code or trigger external operations (which would be Execute).
From the tool's definition Tool description states it will "Append new information to an existing entry" and "adds the update with a timestamp," which modifies data. The action is reversible (appended content can be removed), not destructive.
Documented attack patterns abuse exactly the kind of access append gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Second Brain Cloudflare, and nothing reaches the server without passing your rules. This is the rule we recommend for append:
{
"version": "1",
"default": "deny",
"tools": {
"append": {
"limits": [
{
"counter": "append_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}append 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 new information to an existing entry in your second brain. Use when something has changed or been updated — preserves the original and adds the update with a timestamp. Get the entry ID from recall or list_recent first. It is categorised as a Write tool in the Second Brain Cloudflare MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Second Brain Cloudflare MCP server in PolicyLayer and add a rule for append: 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 Second Brain Cloudflare. Nothing to install.
append 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 append 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 append. 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.
append is provided by the Second Brain Cloudflare MCP server (rahilp/second-brain-cloudflare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 Second Brain Cloudflare tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
6 Second Brain Cloudflare tools catalogued and risk-classified — across an index of 42,500+ MCP servers.