Check your current plan, lookup balance, and remaining quota. Free — does not consume a lookup.
AI agents call check_usage to retrieve information from AgentData 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 account status and quota information without side effects. It is a read-only query that does not create, modify, delete, or move money. The 'Free — does not consume a lookup' note confirms no resource depletion or state change occurs. Severity is low because exposure of usage data poses minimal risk to an AI agent's autonomous operations.
From the tool's definition 'Check your current plan, lookup balance, and remaining quota' — purely informational retrieval of account/usage metadata with no modification, deletion, or financial transaction capabilities.
Attacks that exploit this kind of access
Check your current plan, lookup balance, and remaining quota. Free — does not consume a lookup. It is categorised as a Read tool in the AgentData MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AgentData MCP Server MCP server in PolicyLayer and add a rule for check_usage: 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 AgentData MCP Server. Nothing to install.
check_usage 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 check_usage 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 check_usage. 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.
check_usage is provided by the AgentData MCP Server MCP server (nick-timms/agentdata-mcp-server). 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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