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

With no annotations, the description fully takes on behavioral disclosure. It explains the payment model ($0.01 per call via x402), trial, authentication via PAYMENT-SIGNATURE header, and that no account or signup is needed. It also mentions default and max limit. However, it does not describe rate limits or output structure beyond 'AED/sqft' and ranking.

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 information-dense and front-loaded with the core function and payment details. Every sentence adds value, though the payment explanation could be slightly more concise. It is well-organized and easy to parse.

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?

Given no output schema, the description gives a basic picture of returns (areas ranked by bottom with AED/sqft). It lacks explicit detail on the exact fields per result, which would improve completeness. The payment and trial details are sufficient for understanding usage.

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 coverage is 100%, so the schema already documents the limit parameter well. The description adds no new semantics about the parameter but provides context about the cold-start behavior, which is helpful but not parameter-specific.

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 states the tool scans all 42 Dubai areas, returns those closest to a bottom ranked by value with AED/sqft. It distinguishes itself from siblings like scan_tops and pitch by focusing on bottom values and ranking the entire universe without needing a symbol.

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 explicitly positions this as the best cold-start tool when no symbol is needed, and contrasts with the free pitch tool that only gives counts. It does not mention when not to use it or compare to evaluate_symbol, but the use case is clearly defined.

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