get_account_balance

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

Annotations already mark the tool as read-only and idempotent, which covers the main safety behavior. The description adds response content (balance, currency, profile fields) but no deeper behavioral context such as data freshness, authentication requirements, or error behavior. This is acceptable but adds limited value beyond the annotations.

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 a single compact fragment with no filler. It front-loads the main purpose and lists the returned data in a way that is easy to scan. Every word contributes meaning.

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-only, idempotent getter, the description is complete: it names exactly what the agent will receive and requires no further setup or preconditions. The absence of an output schema is compensated by listing the return fields directly.

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 no parametersebb, and schema description coverage is 100%, so the baseline is 4. The description usefully scopes the operation to 'this account', clarifying that no account identifier is needed and the tool acts on the authenticated/current 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?

The description clearly identifies the resource: the current account's wallet balance, currency, and basic profile. It lacks an explicit verb like 'retrieves', but the tool name and 'current' make the read operation obvious. It is specific enough to stand apart from account-adjacent siblings like get_quota or list_transactions.

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 implies usage: call this when you need the current account's wallet balance and basic profile. However, it does not explicitly state when not to use it or mention any alternative tools, even though related billing and transaction tools exist.

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