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ExpertVagabond

robinhood-chain-mcp

decode_transfer_log

Decode an ERC-20 Transfer event log to extract the sender, recipient, and amount.

Instructions

Decode an ERC-20 Transfer event log into from/to/value.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataYes
topicsYesLog topics; topic0 must be the Transfer hash
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided; description does not disclose behavior if topics mismatch, required hex format, or error handling. Only states basic decode operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single concise sentence with no fluff, but missing critical usage and behavioral information, making it efficient but under-specified.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema, no annotations, and only one sentence; fails to explain input formats, error cases, or output structure beyond from/to/value. Inadequate for a required-param tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema has 50% coverage (only topics described); description adds 'from/to/value' which hints at output but not parameter details like data format. Does not compensate for missing parameter descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states the verb 'Decode' and the specific resource 'ERC-20 Transfer event log into from/to/value', distinguishing it from general decoders like decode_abi or decode_calldata.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool vs alternatives (e.g., decode_abi), no prerequisites (e.g., requiring raw log from get_logs), and no exclusion conditions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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