Create a relationship between two mnemon entries. All 7 labels: MEMBER (NPC ∈ Faction, bidirectional), ALLY (bidirectional), ENEMY (directional), RIVAL (directional), PARENT_OF (Location hierarchy — sourceEntryId is the outer/larger place, e.g. Region → City → District → Tavern), CONTAINS (Locati...
Part of the Argo Mcp server.
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AI agents use create_mnemon_relationship to create or modify resources in Argo Mcp. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call create_mnemon_relationship repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Argo Mcp.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"create_mnemon_relationship": {
"limits": [
{
"counter": "create_mnemon_relationship_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Argo Mcp policy for all 61 tools.
These attack patterns abuse exactly the kind of access create_mnemon_relationship gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Create a relationship between two mnemon entries. All 7 labels: MEMBER (NPC ∈ Faction, bidirectional), ALLY (bidirectional), ENEMY (directional), RIVAL (directional), PARENT_OF (Location hierarchy — sourceEntryId is the outer/larger place, e.g. Region → City → District → Tavern), CONTAINS (Location → NPC present there), LOCATED_IN (NPC → Location; inverse of CONTAINS). sourceEntryId is the 'from' side; targetEntryId is the 'to' side — direction matters. Call describe_mnemon_types for the full valid (sourceType, label, targetType) matrix. For faction membership prefer memberNpcEntryIds / affiliationEntryIds on the NPC itself.. It is categorised as a Write tool in the Argo Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Argo MCP server in PolicyLayer and add a rule for create_mnemon_relationship: 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 Argo Mcp. Nothing to install.
create_mnemon_relationship 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 create_mnemon_relationship 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 create_mnemon_relationship. 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.
create_mnemon_relationship is provided by the Argo MCP server (argo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 61 Argo Mcp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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