Read-only eth_call to XRC729.getOSTC(ostcId), returning the runtime OSTC JSON string.
AI agents call read_xrc729_ostc_json to retrieve information from XGR MCP Gateway without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query against blockchain data via eth_call, which is a non-state-changing operation. It retrieves the OSTC JSON string for a given ostcId with no side effects. The explicit 'read-only' designation and data retrieval nature (no create, update, delete, or execute operations) clearly place this in the Read category with low severity, as it poses minimal risk even if called by an AI agent.
From the tool's definition Tool name contains 'read_' prefix and description explicitly states 'Read-only eth_call' with 'getOSTC' function that returns data without modification.
Attacks that exploit this kind of access
Read-only eth_call to XRC729.getOSTC(ostcId), returning the runtime OSTC JSON string. It is categorised as a Read tool in the XGR MCP Gateway MCP Server, which means it retrieves data without modifying state.
Register the XGR MCP Gateway MCP server in PolicyLayer and add a rule for read_xrc729_ostc_json: 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 XGR MCP Gateway. Nothing to install.
read_xrc729_ostc_json 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 read_xrc729_ostc_json 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 read_xrc729_ostc_json. 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.
read_xrc729_ostc_json is provided by the XGR MCP Gateway MCP server (xgr-network/xgr-mcp). 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.
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