Check RTC gas balance for Beacon messaging. Sending messages through Beacon costs micro-fees in RTC: - Text relay: 0.0001 RTC - Attachment: 0.001 RTC - Discovery: 0.00005 RTC Args: agent_id: Your agent ID to check gas balance for Returns current gas balance in RTC.
AI agents call beacon_gas_balance to retrieve information from RustChain + BoTTube MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves the current gas balance for an agent without modifying any state, creating transactions, executing code, or performing destructive operations. It is purely informational and poses minimal security risk even if misused by an AI agent.
From the tool's definition Tool name 'beacon_gas_balance' and description 'Check RTC gas balance' indicate a query/retrieval operation. The function takes an agent_id as input and 'Returns current gas balance in RTC' — a read-only operation with no side effects.
Documented attack patterns abuse exactly the kind of access beacon_gas_balance gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and RustChain + BoTTube MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for beacon_gas_balance:
{
"version": "1",
"default": "deny",
"tools": {
"beacon_gas_balance": {}
}
}beacon_gas_balance is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check RTC gas balance for Beacon messaging. Sending messages through Beacon costs micro-fees in RTC: - Text relay: 0.0001 RTC - Attachment: 0.001 RTC - Discovery: 0.00005 RTC Args: agent_id: Your agent ID to check gas balance for Returns current gas balance in RTC. It is categorised as a Read tool in the RustChain + BoTTube MCP Server MCP Server, which means it retrieves data without modifying state.
Register the RustChain + BoTTube MCP Server MCP server in PolicyLayer and add a rule for beacon_gas_balance: 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 RustChain + BoTTube MCP Server. Nothing to install.
beacon_gas_balance 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 beacon_gas_balance 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 beacon_gas_balance. 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.
beacon_gas_balance is provided by the RustChain + BoTTube MCP Server MCP server (scottcjn/rustchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 39 RustChain + BoTTube MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
39 RustChain + BoTTube MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.