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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is clear. The description adds a valuable behavioral detail: an api_key is required and can be obtained via register_agent with no key needed. This auth prerequisite is not in the annotations and warrants credit.

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 two short sentences with zero waste. It front-loads the auth prerequisite and then states the action, making every word earn its place. There is no redundancy or filler.

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 simple one-parameter read tool with rich annotations and full schema coverage, the description covers purpose and the key auth prerequisite. It does not explain what a 'position' contains, which might matter since there is no output schema, but the omission is minor for this straightforward getter.

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%, and the single parameter api_key is already documented as 'Your api_key from register_agent'. The description repeats this requirement without adding format, source, or validation details beyond what the schema provides. Baseline 3 is appropriate when the schema does the heavy lifting.

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 states a clear verb and resource: 'Get your current positions'. It scopes the result to 'your' positions, which helps distinguish it from general market data tools like get_prices or get_orderbook. However, it does not explicitly name any sibling tool or contrast its purpose with alternatives, so it falls short of the highest bar.

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 gives an important prerequisite: 'Needs your api_key (register_agent, no key needed)'. That is useful context for invocation. But it offers no guidance on when to use this tool versus alternatives such as get_order_history or get_orderbook, leaving usage conditions implied rather than explicit.

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