Get metadata for a specific NFT serial number including on-chain data, IPFS/metadata URI, and current owner. Costs 0.1 HBAR.
AI agents call nft_token_metadata to retrieve information from Hedera Toolbox without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a data retrieval operation with no side effects. It queries blockchain data (metadata, URI, owner information) for an NFT but does not create, modify, delete, or execute any operations. The financial cost is a usage fee for the query, not a financial transaction moving value. Low severity due to read-only nature and limited blast radius if misused.
From the tool's definition Tool retrieves NFT metadata including on-chain data, IPFS/metadata URI, and current owner. Description explicitly states 'Get' with no modification, deletion, or execution capability. The 'Costs 0.1 HBAR' indicates a query operation with micropayment metering.
Attacks that exploit this kind of access
Get metadata for a specific NFT serial number including on-chain data, IPFS/metadata URI, and current owner. Costs 0.1 HBAR. It is categorised as a Read tool in the Hedera Toolbox MCP Server, which means it retrieves data without modifying state.
Register the Hedera Toolbox MCP server in PolicyLayer and add a rule for nft_token_metadata: 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 Hedera Toolbox. Nothing to install.
nft_token_metadata 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 nft_token_metadata 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 nft_token_metadata. 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.
nft_token_metadata is provided by the Hedera Toolbox MCP server (mountainmystic/hederatoolbox). 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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