Get Balance

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered by structured data. The word 'current' adds a real-time semantics claim that is not in the annotations, which is a modest but genuine addition. No behavioral traits are contradicted.

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 efficient sentence with no wasted words, and the key intent is front-loaded. It is terse but not padded; the main weakness is under-specification rather than verbosity, which is a conciseness strength.

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, safe read operation with one fully documented optional parameter, the description is minimally adequate. However, it does not clarify whether 'account' refers to a bank account, ledger account, or DLA account, and without an output schema the agent gets no hint of the return shape. Given the large sibling set, a bit more disambiguating context would be warranted.

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 the single optional parameter (account_id) is fully documented in the schema itself. The description adds no further meaning about what account_id means, what the default behavior is, or how to select an account, so the baseline of 3 is appropriate.

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 a specific verb ('Get') with a clear resource ('current account balance'), so an agent knows the basic operation. However, it does nothing to differentiate from siblings like get_dla_balance, get_bank_accounts, or get_financial_snapshot, which all plausibly return balance-like data.

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 guidance is given on when to use this tool versus alternatives such as get_dla_balance or get_bank_accounts, nor when the optional account_id should be supplied. The agent must infer the appropriate context entirely from the schema and sibling names.

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