Read on-chain balance for a wallet on a supported EVM chain. Pass token_address=
AI agents call ugf_check_balance to retrieve information from Universal Gas Framework 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 wallet balance data without any side effects, parameter modification, transaction execution, or data mutation. It is a straightforward query operation that fits squarely into the Read category. The low severity reflects that balance information alone cannot be misused to cause financial harm, delete data, or execute unauthorized actions—it is purely observational data retrieval.
From the tool's definition Tool description explicitly states 'Read on-chain balance for a wallet on a supported EVM chain.' The verb 'Read' and the nature of balance queries are purely informational with no state modification.
Attacks that exploit this kind of access
Read on-chain balance for a wallet on a supported EVM chain. Pass token_address=. It is categorised as a Read tool in the Universal Gas Framework MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Universal Gas Framework MCP Server MCP server in PolicyLayer and add a rule for ugf_check_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 Universal Gas Framework MCP Server. Nothing to install.
ugf_check_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 ugf_check_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 ugf_check_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.
ugf_check_balance is provided by the Universal Gas Framework MCP Server MCP server (tychiwallet/ugf-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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