simulate_transaction

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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It mentions returning 'detailed error analysis' but does not clarify whether simulation has side effects (e.g., state changes), what the output format is, or any network/authorization requirements. This is a significant gap for a tool that potentially interacts with the Solana network.

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, front-loaded sentence with no redundant words. It efficiently communicates the core purpose and returns a clear output concept, earning every word's place.

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?

Despite the simple schema (2 params, no output schema), the description lacks important context about what 'detailed error analysis' entails, whether simulation requires a recent blockhash, or if there are any limitations. With no output schema, the description should explain the return format more thoroughly, but it remains vague, leaving the agent underinformed about behavior and edge cases.

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%, with both rpc_url and transaction having clear descriptions in the schema itself. The description does not add any additional parameter meaning beyond the schema, so a baseline score of 3 is appropriate.

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 verb ('Simulate'), the resource ('a Solana transaction'), and the outcome ('return detailed error analysis'). It distinguishes itself from sibling tools like decode_account and anchor_error_lookup by focusing on simulation rather than decoding or lookup.

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 a usage scenario (when you need to simulate a transaction and analyze errors) but does not explicitly state when to use this tool versus alternatives, nor does it provide exclusions or prerequisites. It's a simple definition without comparative guidance.

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