Lists tokens for an NFT contract
AI agents call getNFTtokensByAddress to retrieve information from Somnia 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 NFT token metadata from a blockchain contract by address. It is a query operation with no side effects, no code execution, and no ability to modify state or transfer assets. The blast radius of misuse is limited to unauthorized information disclosure of public blockchain data.
From the tool's definition Tool name contains 'get' and description states 'Lists tokens' — both indicate data retrieval. No modification, deletion, execution, or financial operations are described.
Attacks that exploit this kind of access
Lists tokens for an NFT contract. It is categorised as a Read tool in the Somnia MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Somnia MCP Server MCP server in PolicyLayer and add a rule for getNFTtokensByAddress: 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 Somnia MCP Server. Nothing to install.
getNFTtokensByAddress 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 getNFTtokensByAddress 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 getNFTtokensByAddress. 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.
getNFTtokensByAddress is provided by the Somnia MCP Server MCP server (vastavikadi/somnia-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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