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Rentcast

by io.github.pipeworx-io

Get Rent Estimate

get_rent_estimate
Read-onlyIdempotent

Get a rental price estimate for a US property address. Returns estimated monthly rent, price range, and comparable rental data. Example: "1234 Main St, Austin, TX 78701".

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
_apiKeyYesRentcast API key
addressYesFull street address with city, state, and ZIP (e.g., "5500 Grand Lake Dr, San Antonio, TX 78244")

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
bedroomsYesNumber of bedrooms
latitudeYesGeographic latitude coordinate
bathroomsYesNumber of bathrooms
longitudeYesGeographic longitude coordinate
comparablesYesArray of up to 10 comparable rental properties
property_typeYesType of property (e.g., Single Family, Apartment)
estimated_rentYesEstimated monthly rent in USD
square_footageYesTotal square footage
price_range_lowYesLower bound of estimated rent range
price_range_highYesUpper bound of estimated rent range
comparables_countYesNumber of comparable rental properties

TDQS

A4/5.0
Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint, indicating safe, idempotent operation. The description adds no additional behavioral context beyond listing return types, so it does not significantly enhance transparency beyond what annotations provide.

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 and an example are concise, front-loaded, and contain no superfluous information. Every sentence adds value.

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?

Given an output schema exists (context signal), the description adequately covers the tool's purpose and return types. It could mention data confidence or limitations, but overall it is complete enough for effective use.

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

Parameters3/5

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

Schema covers 100% of parameters with descriptions. The description provides an example address but adds no new meaning to parameters beyond the schema. Baseline 3 is appropriate.

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 returns a rental price estimate for a US property address, including monthly rent, price range, and comparable data. It uses specific verbs and resource, and no sibling tool offers the same function, making it distinct.

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

Usage Guidelines4/5

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

The description implies usage when a rental estimate is needed, but does not explicitly state when not to use or mention alternatives. Given that no sibling tool provides rental estimates, the context is clear enough to guide selection.

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

All Rentcast toolsInspect
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TDQS

A3.9/5.0
Disambiguation4/5

Most tools have distinct purposes, but some overlapping function sets (e.g., multiple Polymarket tools, multiple ask/research tools) could cause confusion. However, descriptions are detailed enough to differentiate.

Naming Consistency4/5

Naming is mostly consistent with snake_case and verb+noun patterns, but a few tools start with nouns (polymarket_*, pipeworx_*), creating minor inconsistency.

Tool Count3/5

At 32 tools, the server feels heavy and covers many disparate domains. While each tool has its place, the high count strains coherence.

Completeness2/5

Given the server name 'Rentcast', only two tools relate to rental data. The rest cover unrelated domains, leaving a major gap for the intended primary purpose.

Resources