simulateUserOperationAssetChanges

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

No annotations are provided, so the description must fully inform behavior. It indicates a non-destructive simulation (preview), but does not detail side effects, permissions, or response format. The description is adequate but minimal.

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 single, clear sentence with no unnecessary words. It effectively communicates purpose and output in a concise manner.

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?

The description does not explain the output format (asset changes structure) despite no output schema. The userOperation parameter's internal structure is undefined. Given these gaps, completeness is moderate.

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 schema adequately describes each parameter. The description adds no additional meaning beyond the schema. The userOperation object lacks structure details, but the description does not compensate.

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 simulates ERC-4337 user operations and previews predicted asset changes. It distinguishes from siblings like simulateAssetChanges (regular transactions) and estimateUserOperationGas (gas estimation).

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 usage for ERC-4337 user operations but does not explicitly state when to use this tool versus alternatives like simulateAssetChanges or estimateUserOperationGas. No exclusions or context are provided.

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