Check remaining budget and spend summary for a Proof Meter capability.
AI agents call meter_budget to retrieve information from Verifiedstate without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves billing data without side effects. It is a read-only operation querying the Proof Meter's budget and spend metrics. While it accesses financial information, it does not move money, commit obligations, or alter state. Confidence is high because the description explicitly states 'check' (passive query), not 'charge', 'debit', or 'settle'.
From the tool's definition Tool name 'meter_budget' and description 'Check remaining budget and spend summary' indicate query/retrieval of billing information. No modification, deletion, or financial transaction execution occurs—only inspection of account state.
Attacks that exploit this kind of access
Check remaining budget and spend summary for a Proof Meter capability. It is categorised as a Read tool in the Verifiedstate MCP Server, which means it retrieves data without modifying state.
Register the Verifiedstate MCP server in PolicyLayer and add a rule for meter_budget: 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 Verifiedstate. Nothing to install.
meter_budget 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 meter_budget 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 meter_budget. 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.
meter_budget is provided by the Verifiedstate MCP server (verifiedstate/verifiedstate-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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