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get_minimum_balance_for_rent

Calculate the minimum SOL balance required to keep an account rent-exempt on Solana, based on data size and network.

Instructions

Calculate the minimum SOL balance needed to keep an account rent-exempt

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
data_sizeYesAccount data size in bytes
networkNoSolana network
Behavior3/5

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

No annotations are provided, so the description must convey behavioral traits. It indicates a read-only calculation with no side effects, but lacks details on authorization, rate limits, or whether it reads blockchain state.

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?

The description is a single, front-loaded sentence with no filler. Every word adds value, making it highly concise.

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

Completeness3/5

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

Given two parameters and no output schema, the description is minimally complete. However, it does not mention the output format (e.g., lamports or SOL) or clarify how the network parameter affects the calculation.

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 description coverage is 100%, so the baseline is 3. The tool description adds overall context but does not provide additional meaning beyond the schema's 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?

The description uses a clear verb 'Calculate' and specifies the resource 'minimum SOL balance' with context 'to keep an account rent-exempt'. It directly states the tool's function and distinguishes it from sibling tools like get_balance or get_account_info.

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 does not explicitly state when to use this tool versus alternatives, nor does it provide context like prerequisites or when not to use it. The usage is implied but not guided.

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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