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

With no annotations, the description carries the full burden. It does disclose a meaningful behavioral trait: pay-per-call with a specific cost ($0.003 USDC), which is valuable for an agent deciding whether to invoke it. It also describes the output categories, but it does not mention potential errors, signature format requirements, or whether the call is read-only.

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

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

The description is a concise single sentence that front-loads the core output information and appends the pay-per-call cost. Every clause adds useful information, and there is no wasted wording.

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

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

For a simple tool with one required parameter and no output schema, the description is largely complete: it tells the agent what data will be returned and warns about the cost. It could be improved by noting any special formatting requirements for the signature, such as base58 encoding or mainnet specificity, but these are not critical gaps.

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

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

Schema coverage is 100%, so the baseline is 3. The schema already documents the single 'signature' parameter. The description adds confirmation that the signature is for a Solana transaction, but it does not add format details, network context, or example values beyond what the schema conveys.

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

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

The description clearly identifies the resource: a Solana transaction signature, and lists the exact data it returns (status, slot, fee, block time, transfer summary). It lacks an explicit verb like 'retrieves' or 'gets', but the noun-phrase style is still unambiguous and distinguishes it from the sibling tools, which cover health, token, account, and trending data.

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

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

There is no guidance on when to use this tool versus the siblings solana_health, solana_token, solana_account, or solana_trending. The use case is implied by the resource type, but no explicit context, prerequisites, or exclusions are provided.

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