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redfin_region_trends

Get median list and sale prices, sale-to-list ratio, offers, days on market, inventory, and year-over-year changes for a Redfin region.

Instructions

Get Redfin region market trends. Returns Redfin's aggregate market trends for a region (median list/sale price, sale-to-list, offers, days on market, inventory, year-over-year). Faithful pass-through of Redfin's public aggregate-trends resource.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
region_idYesRedfin region id from autocomplete
region_typeNoRedfin region type from autocomplete (defaults to 6, city)
Behavior2/5

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

No annotations provided, so the description should disclose behavioral traits. It only mentions it is a 'faithful pass-through', but lacks details on rate limits, data freshness, permissions, or idempotency. This is insufficient for a tool with no annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, no fluff. First sentence states purpose, second lists data points and notes pass-through nature. Efficient and front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with 2 parameters and no output schema, the description covers functionality and return data. It lacks details on time range or historical scope, but the listed metrics sufficiently inform the agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, but the description adds operational context: both parameters come from 'autocomplete', and region_type defaults to 6 (city). This helps the agent understand how to obtain valid parameter values.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose with a specific verb ('Get') and resource ('Redfin region market trends'). It lists the returned data points, distinguishing it from property-level sibling tools like redfin_property or redfin_search.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage ('aggregate market trends for a region') but does not explicitly advise when to use this tool over siblings or provide exclusion criteria. No guidance on prerequisites like needing a region_id from autocomplete.

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

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