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ERC-20 token metadata (symbol, name, decimals) and one holder's balance.","inputSchema":{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"holder":{"description":"0x-prefixed wallet address","type":"string"},"network":{"description":"Chain to read (default base)","enum":["base","ethereum","arbitrum","polygon"],"type":"string"},"token":{"description":"0x-prefixed ERC-20 contract address","type":"string"}},"required":["token","holder"],"type":"object"},"name":"chain_token"},{"description":"$0.001 per call. 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