Get the relationship between two specific entities
AI agents call get_relationship_between to retrieve information from DMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing game state data (relationship information between entities) without creating, modifying, deleting, or executing external operations. It is a pure read operation typical of dungeon master query functionality. The context (RPG game state management) confirms it operates on in-game relational data. No destructive, financial, or executable side effects are implied.
From the tool's definition Tool name 'get_relationship_between' and description 'Get the relationship between two specific entities' indicate a query/retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access get_relationship_between gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and DMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_relationship_between:
{
"version": "1",
"default": "deny",
"tools": {
"get_relationship_between": {}
}
}get_relationship_between is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the relationship between two specific entities. It is categorised as a Read tool in the DMCP MCP Server, which means it retrieves data without modifying state.
Register the D MCP server in PolicyLayer and add a rule for get_relationship_between: 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 DMCP. Nothing to install.
get_relationship_between is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_relationship_between 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 get_relationship_between. 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.
get_relationship_between is provided by the D MCP server (shawnrushefsky/dmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from DMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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204 DMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.