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RentCast MCP Server

RentCast MCP Server

by bfhayes
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Remote

get_rent_estimate

Estimate a property's monthly rental value from its address for investment analysis. Provides rent valuation to guide real estate decisions.

Instructions

Get a rental value estimate for investment analysis of a property.

Args: address: Full property address (e.g., "5500 Grand Lake Dr, San Antonio, TX, 78244")

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "address": "<address>"
    },
    "name": "get_rent_estimate"
  }
}

Input Schema

NameRequiredDescriptionDefault
addressYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.6/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states the purpose and does not mention any side effects, data sources, limitations, or typical response characteristics, leaving the agent without insight into what happens when the tool is invoked.

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?

The description is two sentences long, front-loaded with the core purpose, and includes a structured 'Args:' block that directly clarifies the only parameter. Every sentence earns its place with no redundant filler.

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 one-parameter tool with an output schema present, the description is reasonably complete. It clearly identifies the input and purpose, though it could benefit from a brief note about what kind of estimate (e.g., monthly rent) is returned, but the output schema likely covers that.

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 description coverage is 0%, but the description compensates by explaining the 'address' parameter as 'Full property address' and providing a concrete example. This adds meaning beyond the schema's bare 'string' type, helping the agent formulate correct input.

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 function with a specific verb and resource: 'Get a rental value estimate for investment analysis of a property.' This distinguishes it from sibling tools like get_property_value or get_property_record, which likely serve different valuation or lookup purposes.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives. It does not mention any exclusions, prerequisites, or contextual scenarios for choosing this tool over sibling tools like get_market_stats or search_recent_sales.

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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