AI agents call measure_distance to retrieve information from ChatRPG without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only calculates/reads a distance value between two grid positions using D&D 5e rules. It performs a pure computation with no side effects, data modification, or external operations. It is a read/query operation with minimal blast radius.
From the tool's definition Measure distance between two positions using D&D 5e grid mechanics
Attacks that exploit this kind of access
Measure distance between two positions using D&D 5e grid mechanics. It is categorised as a Read tool in the ChatRPG MCP Server, which means it retrieves data without modifying state.
Register the ChatRPG MCP server in PolicyLayer and add a rule for measure_distance: 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 ChatRPG. Nothing to install.
measure_distance 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 measure_distance 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 measure_distance. 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.
measure_distance is provided by the ChatRPG MCP server (mnehmos/mnehmos.chatrpg.game). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →