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

With no annotations provided, the description carries the full burden of transparency. It excellently discloses specific behavioral outcomes (pending, confirmed, finalized, failed) and the detailed information provided in the result (block/slot and confirmations). Furthermore, it explicitly mentions the pricing mechanism.

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 extremely efficient, consisting of two factual sentences that front-load the function and then provide critical operational details. There is zero unnecessary phrasing.

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?

Given the lack of an output schema, the description is quite complete. It defines the four possible states the tool returns and specifies the associated metadata (block/slot/confirmations), giving the agent all necessary information about the expected result.

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%, setting the baseline high. The description adds minor value by reinforcing that the 'tx' parameter can be either a Solana signature or an EVM hash, though this is somewhat implied by the context of the tool itself.

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 tool's function: retrieving the status (pending, confirmed, finalized, or failed) of a transaction. It specifies the types of inputs supported (Solana signature or EVM hash), leaving no doubt about its primary purpose.

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?

While it does not name alternatives or specify prerequisites (like needing an account with funds), it provides essential operational usage guidelines by stating the cost of the call (0.001 USDC) and the payment mechanism (via x402), which is highly relevant for execution.

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