arc200_transfer_from_txn

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

No annotations are provided, so the description carries the full burden. It discloses that this is a simulation and that the spender signs, which is useful behavioral context. However, it does not clarify what the tool returns (e.g., a transaction object, simulated result) or whether it has side effects, leaving significant ambiguity for the agent.

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, concise sentence that conveys the operation, signature, and signing party without wasted words. It is fully front-loaded and easy to parse.

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 transaction-simulation tool with no output schema, the description gives the core purpose and signature but omits details about the return value or side effects. Despite being brief, it is adequate for an agent to understand the tool's role, though it could be enriched with more behavioral context.

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 descriptions cover most parameters (83%), and the description adds minimal new meaning beyond the signature. It reinforces that spender is the signer and lists params in order, but does not explain roles like 'from' being the source and 'to' the destination beyond what the function name implies. Baseline 3 is appropriate given high schema coverage.

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' and the resource 'ARC-200 transferFrom', including the function signature (spender, from, to, amount) and who signs. It effectively distinguishes this from sibling tools like arc200_transfer_txn by naming the specific operation.

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 the use case: when simulating a transferFrom with spender authorization. However, it does not explicitly compare with alternatives such as arc200_transfer_txn or arc200_approve_txn, nor does it state when not to use this tool. The context is clear from the function name but exclusions are missing.

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