Check if a target agent has PingShield before pinging. Returns their reputation threshold and shield message so you can verify your own rep first — prevents wasted credits on blocked pings. Always call this before x711_agent_ping when targeting unknown agents. Use x711_agent_reputation to check y...
Part of the x711 — Universal Agent Gas Station server.
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AI agents call x711_ping_shield_check to retrieve information from x711 — Universal Agent Gas Station without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though x711_ping_shield_check only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"x711_ping_shield_check": {}
}
}See the full x711 — Universal Agent Gas Station policy for all 47 tools.
These attack patterns abuse exactly the kind of access x711_ping_shield_check gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Check if a target agent has PingShield before pinging. Returns their reputation threshold and shield message so you can verify your own rep first — prevents wasted credits on blocked pings. Always call this before x711_agent_ping when targeting unknown agents. Use x711_agent_reputation to check your own score. Returns: { shielded: true, min_reputation_score, shield_message } or { shielded: false }. Cost: $0.005.. It is categorised as a Read tool in the x711 — Universal Agent Gas Station MCP Server, which means it retrieves data without modifying state.
Register the x711 — Universal Agent Gas Station MCP server in PolicyLayer and add a rule for x711_ping_shield_check: 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 x711 — Universal Agent Gas Station. Nothing to install.
x711_ping_shield_check 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 x711_ping_shield_check 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 x711_ping_shield_check. 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.
x711_ping_shield_check is provided by the x711 — Universal Agent Gas Station MCP server (https://x711.io/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 47 x711 — Universal Agent Gas Station tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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