Create a relationship between two entities in the knowledge graph
AI agents use create_knowledge_relationship to create or update resources in ZMCPTools — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ZMCPTools environment.
The tool creates new relationships between entities in a knowledge graph, which is a write operation that modifies the knowledge graph state. It does not execute arbitrary code, delete data, or move financial resources. While it modifies data, the operation is reversible (relationships can be removed).
From the tool's definition Tool name 'create_knowledge_relationship' and description 'Create a relationship between two entities in the knowledge graph' indicate creation of new data structures in a knowledge graph system. This is a reversible modification operation.
Documented attack patterns abuse exactly the kind of access create_knowledge_relationship gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ZMCPTools, and nothing reaches the server without passing your rules. This is the rule we recommend for create_knowledge_relationship:
{
"version": "1",
"default": "deny",
"tools": {
"create_knowledge_relationship": {
"limits": [
{
"counter": "create_knowledge_relationship_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_knowledge_relationship 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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Create a relationship between two entities in the knowledge graph. It is categorised as a Write tool in the ZMCPTools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the ZMCPTools MCP server in PolicyLayer and add a rule for create_knowledge_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 ZMCPTools. Nothing to install.
create_knowledge_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_knowledge_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_knowledge_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_knowledge_relationship is provided by the ZMCPTools MCP server (zachhandley/zmcptools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 70 ZMCPTools tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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70 ZMCPTools tools catalogued and risk-classified — across an index of 42,500+ MCP servers.