buy_stock

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

With no annotations, the description carries the full burden of behavioral disclosure. 'Buy a stock' only names the action; it does not reveal side effects (e.g., portfolio changes, order execution), whether it is a real or simulated transaction, or any error behavior.

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 three-word description is undeniably concise, but it is under-specification rather than efficient structure. It omits critical information, so the minimalism is not an asset here.

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 financial transaction tool with no annotations and no output schema, the extremely brief description is severely incomplete. It lacks context on execution semantics, prerequisites, response format, and potential risks, making it impossible for an agent to invoke safely.

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 0%, but the description adds no parameter meaning. It does not explain that 'stock' is a ticker/identifier and 'qty' is a positive share count, leaving both parameters semantically underdefined.

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 uses the verb 'Buy' and resource 'stock', making the primary action clear. It distinguishes from the sibling 'sell_stock' by direction, but lacks specificity (e.g., market order, ticker symbol) that would fully define scope.

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 usage guidance is provided. The description does not state when to use this tool vs 'sell_stock' or mention any prerequisites, exclusions, or alternative context.

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