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

No annotations are provided, so the description carries the burden. It implies a pure, deterministic formatting transform with no mention of side effects, which is appropriate for this tool type, but it does not state that it is read-only/local or how the output is shaped (e.g., symbol placement), leaving a modest gap.

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 well-formed sentence with the core purpose front-loaded and zero filler. Nothing is wasted.

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 local formatter with no output schema or annotations, the description is mostly adequate, but it omits the nested payload structure and the exact output convention (symbol before/after the number), which an agent would need to call it confidently.

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 0%, so the description must compensate. It does name all three leaf fields (amount, decimal precision, currency symbol), matching the schema semantics, but it never explains the required nested 'payload' wrapper or the defaults (decimals=2, symbol='$') and min/max bounds that the schema enforces.

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 (format) and resource (numeric amount), plus the three aspects it controls: thousands separators, decimal precision, currency symbol. It does not distinguish itself from the sibling money_allocate, which is the only nearby alternative, so it stops short of 5.

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?

There is no indication of when to use this versus money_allocate, nor any prerequisites. Usage is only implied by the name and description; no exclusions or context are offered.

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