AI agents use save_memory to create or update resources in SLayer — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SLayer environment.
Without an explicit description, confidence is reduced. The tool name and sibling context suggest it writes or modifies stored state (Write category) rather than reading or executing queries. The severity is medium because memory modifications could affect agent behavior or data lineage, but are typically reversible via edit or delete operations available on this server.
From the tool's definition Tool name 'save_memory' suggests persisting state or configuration data. Context from sibling tools (create_datasource, create_model, edit_datasource, edit_model) indicates this server manages data schemas and models.
Documented attack patterns abuse exactly the kind of access save_memory gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SLayer, and nothing reaches the server without passing your rules. This is the rule we recommend for save_memory:
{
"version": "1",
"default": "deny",
"tools": {
"save_memory": {
"limits": [
{
"counter": "save_memory_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}save_memory 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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save_memory. It is categorised as a Write tool in the SLayer MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the SLayer MCP server in PolicyLayer and add a rule for save_memory: 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 SLayer. Nothing to install.
save_memory 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 save_memory 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 save_memory. 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.
save_memory is provided by the SLayer MCP server (motleyai/slayer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SLayer, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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20 SLayer tools catalogued and risk-classified — across an index of 43,000+ MCP servers.