simulate_transaction

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

With no annotations provided, the description carries the transparency burden. It clearly indicates this is a dry-run (non-destructive) operation, returns success/revert and gas estimate, and requires an API key. This effectively communicates the key behavioral traits, though it could be more explicit about the lack of state changes.

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 concise, two sentences, with the primary action front-loaded and no wasted words. It efficiently conveys purpose, output, and authentication requirements.

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 relatively simple tool with 4 parameters and no output schema, the description provides sufficient context including what the tool returns and the required authentication. Minor details like exact error formats are absent, but the overall picture is complete for practical use.

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 description coverage is 100%, so the baseline is 3. The description does not add additional parameter semantics beyond the schema, but the schema already documents all four parameters adequately.

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 states the tool performs a dry-run simulation of an unsigned transaction with a specific verb ('Dry-run') and resource ('unsigned tx'). It distinguishes itself from actual broadcast tools like broadcast_transaction by emphasizing the non-broadcasting nature.

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?

The description implies this tool is for pre-broadcast testing, but it does not explicitly state when to use it versus alternatives such as broadcast_transaction. The context is clear, yet no explicit exclusions or alternative references are provided.

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