PRESERVE PROTECT KEEP PIN - Preserve a memory from decay, optionally until a specific date. Keywords: preserve, protect, keep, pin, save, retain, bookmark, favorite
AI agents use memory_preserve to create or update resources in MCP AI Memory — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP AI Memory environment.
The tool modifies an existing memory record by changing its decay/expiration status, which is a reversible write operation. It does not create new memories (would be Write but simpler), delete anything (would be Destructive), or execute arbitrary operations (would be Execute). The modification is straightforward metadata management with no destructive or side-effect risks beyond standard data mutation.
From the tool's definition Tool description explicitly states 'Preserve a memory from decay' and 'optionally until a specific date'. Keywords include 'preserve, protect, keep, pin, save, retain, bookmark, favorite' — all indicating modification of metadata (preservation…
Documented attack patterns abuse exactly the kind of access memory_preserve gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP AI Memory, and nothing reaches the server without passing your rules. This is the rule we recommend for memory_preserve:
{
"version": "1",
"default": "deny",
"tools": {
"memory_preserve": {
"limits": [
{
"counter": "memory_preserve_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}memory_preserve 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.
PRESERVE PROTECT KEEP PIN - Preserve a memory from decay, optionally until a specific date. Keywords: preserve, protect, keep, pin, save, retain, bookmark, favorite. It is categorised as a Write tool in the MCP AI Memory MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP AI Memory MCP server in PolicyLayer and add a rule for memory_preserve: 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 MCP AI Memory. Nothing to install.
memory_preserve 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 memory_preserve 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 memory_preserve. 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.
memory_preserve is provided by the MCP AI Memory MCP server (scanadi/mcp-ai-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 17 MCP AI Memory tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
17 MCP AI Memory tools catalogued and risk-classified — across an index of 42,500+ MCP servers.