schwab_option_buy_to_open

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

The description provides no behavioral information beyond the basic action. No annotations are present, so the description must carry the full burden. It does not disclose order type (market/limit), execution behavior, error handling, or confirmation responses. For a trading tool, this is a critical omission.

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 short ('Buy an option to open a position (Schwab)'), but this is under-specification rather than conciseness. It fails to convey essential information. Every sentence should add value, but here the sentence is mostly redundant with the tool name.

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 tool's complexity (6 required parameters, many sibling tools, no annotations, and an output schema not utilized), the description is woefully incomplete. It does not specify order type, contract specifications, or any contextual prerequisites. The agent cannot use this tool reliably with the current description.

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?

The input schema has 0% parameter description coverage, meaning the description must explain the parameters. However, the description adds nothing about the six required parameters (account_hash, symbol, quantity, option_type, strike, expiration). An agent needs to know valid values for option_type, format for expiration, etc., but none is provided.

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 'Buy an option to open a position (Schwab)' is a tautology that merely restates the tool's name. It does not distinguish the tool from siblings like schwab_order_buy_option_limit, which also buys options but with a limit order. The verb 'buy' and resource 'option' are clear, but no additional context is provided to differentiate it from similar tools.

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?

No guidance is given on when to use this tool versus alternatives. For example, it is unclear whether this tool executes a market order or a limit order, and how it differs from schwab_order_buy_option_limit. There are no when-to-use or when-not-to-use instructions, nor any mention of prerequisites like margin requirements.

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