AI agents use aim_memory_add_facts to create or update resources in Mcp Knowledge Graph — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Knowledge Graph environment.
This tool creates or modifies data (facts) in a persistent memory system. While the operation is reversible (facts can be removed via aim_memory_remove_facts or forgotten via aim_memory_forget), it alters stored state.
From the tool's definition Tool name 'aim_memory_add_facts' and description 'Add facts to existing memories' indicate creation/modification of data in the knowledge graph store.
Documented attack patterns abuse exactly the kind of access aim_memory_add_facts gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Knowledge Graph, and nothing reaches the server without passing your rules. This is the rule we recommend for aim_memory_add_facts:
{
"version": "1",
"default": "deny",
"tools": {
"aim_memory_add_facts": {
"limits": [
{
"counter": "aim_memory_add_facts_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}aim_memory_add_facts 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.
Add facts to existing memories. It is categorised as a Write tool in the Mcp Knowledge Graph MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Knowledge Graph MCP server in PolicyLayer and add a rule for aim_memory_add_facts: 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 Knowledge Graph. Nothing to install.
aim_memory_add_facts 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 aim_memory_add_facts 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 aim_memory_add_facts. 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.
aim_memory_add_facts is provided by the Mcp Knowledge Graph MCP server (shaneholloman/mcp-knowledge-graph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Mcp Knowledge Graph tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
10 Mcp Knowledge Graph tools catalogued and risk-classified — across an index of 42,500+ MCP servers.