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

No annotations are provided, so the description carries the full burden. It does disclose genuinely useful behavioral context: the free beta disables payments, ANANSI credits convert at 1,000 = $1, and USDC/$ANANSI are 'coming soon' with a discount cap. However, it never states that the tool itself is a read-only informational lookup or what it returns, so an agent cannot fully predict its behavior.

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?

One compact paragraph with the tier structure front-loaded (Free, Room, House) followed by payment mechanics. It is dense but every clause carries pricing or payment-state information; only the missing purpose statement keeps it from a 5.

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?

With zero parameters, no annotations, and no output schema, this is a low-complexity informational tool, and the description supplies the substantive content (tiers, credit rate, beta payment status). What is missing is an explicit statement of what the call returns, which is minor at this complexity.

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 the baseline of 4 applies. The description correctly spends no space on parameter semantics and instead conveys the pricing content the tool presumably returns.

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 reads as a price list rather than a tool definition: no verb states what the tool returns or does (e.g. 'returns house plan pricing'). An agent can infer it is a pricing/info lookup for house plans, but it is not explicitly distinguished from the sibling buy_house_plan, which is the obvious alternative an agent must choose between.

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 statement of when to call this tool versus buy_house_plan, house_get, or house_list. The pricing tiers imply a pre-purchase lookup use case, but that is left entirely to inference.

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