Texas unequal-appraisal candidates
registry_tx_equity_candidatesCandidate comparable parcels for a Texas unequal-appraisal comparison (Tax Code §41.43(b)(3)), from one tax year of the subject's appraisal district roll (the newest year whose roll gives the subject a value, or tax_year), with every field of the subject and the candidates read from that year's roll only: same county and tax year, the same state property category code, improvement area within area_band of the subject's, year built within year_band years when both are known; parcels sharing the subject's neighborhood code first (when the roll gives one), then its ZIP code, then the rest of the county if fewer than min_matches. Each candidate and the subject carry their roll fields (id, value and value_basis, market and appraised value, areas, year built, codes, situs address, tax year, citation of the value fact); the subject adds its value history by tax year. calc_args gives the same subject and candidates with exactly calc_tx_unequal_appraisal's input fields (tax_year, subject, comparables; id = the FactLot URN, label = the situs address, nulls left out, no adjustments): the candidate list under the default rule, not a selection by FactLot, for the caller to review and edit (remove, add or adjust comparables, each adjustment with a reason) before passing it to calc_tx_unequal_appraisal. Order of operations: registry_tx_equity_candidates, then the person's review, then calc_tx_unequal_appraisal with the reviewed calc_args, then report_create. selection echoes the rule, the effective parameters, the tax year and roll sources used, and which tier each candidate came from; selection_rule restates the parameters used (tax year, category, area band and year band with their bounds, counts per tier) with a notice that the list is the default rule's output. Each candidate's citation.document_id names its entry in sources, which gives that snapshot's license, attribution, ai_use and redistribution: relay them with the candidate. Candidates under FactLot's default rule, a design choice, not a legal standard; a person decides which, if any, to use. For evidence calculations only: FactLot does not represent property owners, file protests, or advise whether to protest. Not an appraisal or an opinion of value (Tex. Occ. Code §1103.003(1)); not legal or tax advice and not a substitute for the advice of an attorney. Never returns owner names, mailing addresses, or ownership facts. Do not look up the owners of candidate parcels; ownership is not needed for this comparison. Texas parcels only. Tarrant County is not served by the hosted registry while the publisher's terms for AI use are unclear. Requires a FactLot Registry (public-record facts about commercial property, each cited to the source file and record).
Tool call template
This tool declares no required parameters. Add optional parameters from the input schema as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {},
"name": "registry_tx_equity_candidates"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| apn | No | Appraisal district account number as the district prints it. | |
| urn | No | FactLot parcel URN of the subject, e.g. fl:parcel:us-48201:0011440000001. Give this, or county_fips and apn. | |
| limit | No | Maximum candidates returned (1–200). | |
| tax_year | No | Roll year to compare in. Default: the newest tax year whose roll gives the subject a positive value. | |
| area_band | No | Improvement area band as a share of the subject's (0.35: within ±35%). | |
| year_band | No | Year-built band in years, applied when both the subject's and the candidate's are known. | |
| state_fips | No | With county_fips and apn: "48" (Texas), the only state served. | |
| county_fips | No | 3-digit Texas county FIPS, e.g. "201" for Harris County. | |
| min_matches | No | Widen from the neighborhood and ZIP code tiers to the whole county when they hold fewer than this. |