lounge_spend_status

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

No annotations are provided, so the description carries the full transparency burden. It discloses that the tool is FREE (no cost), that spending is counted when a paid call is attempted (not just successful), and that the figure is a conservative never-understated estimate. This goes beyond the basic purpose and provides useful behavioral context.

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 exactly two sentences, front-loaded with the key fact 'FREE' and the core purpose. The second sentence adds essential detail on how spending is tallied without redundancy. No word 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 zero-parameter read-only status tool, the description covers the purpose, the free cost, and the conservative counting semantics. However, it does not describe the return value (e.g., whether it returns a numeric amount, a boolean, or a status string), and there is no output schema to fill that gap. This is a minor completeness shortfall for an otherwise well-specified tool.

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?

With zero parameters, the input schema is empty (100% coverage). The description adds no parameter details because there are none, earning the baseline of 4 for 0-param tools. It does provide context about the ceiling variable, but this is not a parameter.

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 'Check' and identifies the resource 'this session's spending against the configured ceiling (MAX_SPEND_USD)', clearly distinguishing it from sibling tools about duels, oracle, plaques, etc. The leading 'FREE' also clarifies its non-cost nature.

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 for monitoring session spending relative to a ceiling but does not explicitly state when to use it vs alternatives (e.g., before paid calls) or exclude other use cases. No alternatives are mentioned, leaving usage context to inference.

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