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invoke_contract

Invoke smart contract methods on Neo N3. Read operations run without a wallet; write operations require a private key and explicit confirmation.

Instructions

Invoke a smart contract method. Read operations run without a wallet. Write operations require fromWIF and confirm=true.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
networkNoNetwork to use: mainnet or testnet
fromWIFNoSender WIF private key (required for write operations)
contractNoContract reference: known name (e.g. "NeoFS"), script hash (0x...), or Neo address
scriptHashNoContract script hash (40 hex chars, optional 0x prefix)
contractNameNoKnown contract name (e.g. "GAS", "NEO", "NeoFS")
nameOrHashNoContract name or script hash (alias for contract)
operationYesContract method name to invoke
argsNoMethod arguments as an array of values
signersNoTransaction signer scopes for write operations
confirmNoSet to true to execute write operations (safety confirmation)
Behavior3/5

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

The description discloses read/write behavior and requirements, but omits details about error handling, gas costs, or return values. With no annotations, the description carries the full burden and falls short.

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

Conciseness5/5

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

Two sentences, clear and front-loaded. Every word adds value, no redundancy.

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?

Despite 10 parameters and no output schema, the description lacks details on return values, side effects, or when to use this tool vs siblings. Incomplete for a complex invocation tool.

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

Parameters3/5

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

Schema coverage is 100% with parameter descriptions. The description adds context about fromWIF and confirm being required for writes, but this is already implied by the schema. Baseline 3 applies.

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

Purpose4/5

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

The description clearly states the action (invoke) and resource (smart contract method), and distinguishes read vs write. However, it does not differentiate from sibling tools like estimate_invoke_fees, which could be confused.

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

Usage Guidelines3/5

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

The description gives conditions for read vs write operations but lacks explicit guidance on when to use this tool instead of alternatives such as estimate_invoke_fees or deploy_contract.

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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