Initialize paper account

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

Adds real behavioral context beyond the annotations: it writes the local account database and re-calling on an existing account replaces its balance (consistent with idempotentHint=true). It also states local/filesystem scope, matching openWorldHint=false. It does not describe return format or failure modes, but with destructiveHint already flagging mutation, this is solid.

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?

Two tight sentences, with the destructive re-run caveat and the ordering requirement front-loaded before the alternative tool reference. No wasted text.

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?

With an output schema present, return values needn't be explained, and both parameters are documented. The description covers the mutation semantics and the sibling alternative; only minor gaps like auth/permission needs remain.

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%, so account naming rules and the balance default are fully documented in the schema. The description adds no additional parameter syntax or meaning, so the baseline of 3 applies.

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?

States a specific verb and resource ('Create a paper trading account') plus the key parameter effect ('with a starting USD balance'). It is clearly distinguishable from reset_account and the trading siblings.

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?

Explicitly says when to use it ('Run it before any trade') and names the alternative with its condition ('use reset_account to wipe trades and positions instead'). Nothing is left to inference.

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