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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds genuine context beyond that: it is a 'faithful pass-through' (no transformation of upstream data) and returns 'normalized listing rows', which tells the agent about fidelity and output shape.

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 sentence, verb-first, no filler. The scope (comparables for the property) and the return characterization are packed in without waste.

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 one-parameter, read-only pass-through with a full output schema and safety annotations, the description covers what the tool is and what it returns. Only missing nicety is guidance on how the comparable set is sourced/limited, which is minor here.

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% and the single property_id is fully documented in the schema, so the baseline is 3. The description adds no syntax or format detail for the id beyond what the schema already says.

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 (Returns) and resource (Redfin's comparable/similar listings for the property), which clearly separates it from sibling redfin_property (details), redfin_estimate (valuation), and redfin_search (query). It doesn't explicitly name alternatives, but the verb+resource is unambiguous.

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 you call it with a property in hand to get comparables, but it gives no explicit when-to-use/when-not guidance and never names redfin_property or redfin_estimate as alternatives. An agent must infer the routing decision.

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