Get NEP-11 balances for an address with additive asset enrichment when available
AI agents call get_nep11_balances to retrieve information from Neo N3 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 blockchain data (NEP-11 token balances for a specified address) with no side effects, reversible actions, or destructive operations. It is a read-only query operation. The 'additive asset enrichment' clause refers to optional data augmentation during retrieval, not data modification. Low severity because misuse would only expose existing public blockchain data already visible on-chain.
From the tool's definition Tool name 'get_nep11_balances' and description 'Get NEP-11 balances for an address' indicate a retrieval operation. NEP-11 is Neo's non-fungible token standard; the tool queries and returns balance data without modifying state.
Attacks that exploit this kind of access
Get NEP-11 balances for an address with additive asset enrichment when available. It is categorised as a Read tool in the Neo N3 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Neo N3 MCP Server MCP server in PolicyLayer and add a rule for get_nep11_balances: 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 Neo N3 MCP Server. Nothing to install.
get_nep11_balances 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 get_nep11_balances 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 get_nep11_balances. 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.
get_nep11_balances is provided by the Neo N3 MCP Server MCP server (r3e-network/neo-n3-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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