Get Account Balances

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

Annotations already declare readOnly, idempotent, non-destructive, open-world, so the safety profile is covered. The description still earns credit by disclosing what the payload contains (buying power, asset values, pending transactions), which is the main behavioral unknown for a no-parameter read with no output schema. It does not mention authentication requirements or per-account scoping.

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?

A single front-loaded sentence with no redundant wording; the resource leads and the returned components follow. Nothing could be removed without losing information.

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 zero-parameter read with no output schema, the description supplies the essential missing piece — what comes back. What remains unstated is whose balances are returned absent any account identifier (implying the authenticated user) and how this differs from position-level siblings.

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 tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. The description correctly implies no inputs are needed by framing the call as an unfiltered snapshot of the user's own account.

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 ("Get user's current account balances") and enumerates the contents: buying power, asset values, pending transactions. That differentiates it from order/position tools by implication, though it never explicitly contrasts with the nearby get_user_positions or get_your_incentive_earnings 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?

Usage is only implied by the word "current" and the enumerated outputs — an agent can infer this is the snapshot/overview call. There is no explicit when-to-use statement, no guidance on refresh cadence, and no note distinguishing it from get_user_positions when the agent needs position-level detail.

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