AI agents call semrush_api_units_balance to retrieve information from Semrush without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries the current API units balance, which is a read-only operation that returns data about resource consumption. It has no side effects, cannot modify data, and poses minimal risk if misused by an AI agent—at worst, an attacker learns the current quota status, which is low-impact information.
From the tool's definition Tool name 'semrush_api_units_balance' and description 'Check the remaining API units balance' indicate a query operation that retrieves account/billing information without modifying or executing any actions.
Attacks that exploit this kind of access
Check the remaining API units balance. It is categorised as a Read tool in the Semrush MCP Server, which means it retrieves data without modifying state.
Register the Semrush MCP server in PolicyLayer and add a rule for semrush_api_units_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 Semrush. Nothing to install.
semrush_api_units_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 semrush_api_units_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 semrush_api_units_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.
semrush_api_units_balance is provided by the Semrush MCP server (superseoworld/semrush-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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