Robin Saige we check the tools AI agents call

GUTHMANN® Berlin Real Estate

estate.guthmann/mcp

Berlin real estate for AI agents: granular market data and property search, free, by GUTHMANN®.

— the operator's own registry description reported

Publisher estate.guthmann · first seen 2026-09-02 · endpoint https://mcp.guthmann.estate/mcp

allow
verdict
rich-solo
cluster
ok_tools
answers
37
tools served

Dependency rating derived

allow
allow — alive & usable · retrieval-public ● · V3 has answer key ◐
allow — because answers ●, 37 tools legible (band B) ●, no confirmed drift in 1 probes ●; not yet checked: truth (2 attempts unverifiable, 0 disagreements)

Cluster rich-solo · distinctiveness 0.351 (moderate). Every figure is a percentile or class within the 15,472-server censussee the whole spectrum.

Does it answer? Q1 · observed
answersalive_tools
latency168 ms
vs populationtypical
protocolcurrent
authopen
Can it be used? Q4 · observed
tools37
vs populationhigh
capabilities1
harnessB
Did it hold when checked? Q3–Q4 · derived
identitysolo
servers on its host1
verifiabilityunassessed
duplicate inventoryno
drift events0
answers true0/0 agree

🔏 Signed receipt rr_ca512f769c372aa1637002f2 · ed25519 · key rs-rcpt-2026-08 — this rating is tamper-evident; an agent gets the full signature from check_server and can verify it against the published key.

Q1Does it answer?alive & usable — 1 probes ●evidence ↓
Q2What is it?retrieval-public ● evidence ↓
Q3Can it be checked?V3 has answer key ◐evidence ↓
Q4Did it hold?harness B · truth not yet run · no drift ●evidence ↓
Q5What company does it keep?rich-solo · 1 on its host (context, not verdict) ◐evidence ↓

● observed · ◐ derived · ○ reported — the verdict synthesizes Q1–Q4; Q5 is context. Methodology →

History observed

Every probe we made, oldest → newest (1 shown, 2026-09-06 → 2026-09-06). Green answered · amber answered-but-walled · red no useful answer. A gap in our cadence is a gap in coverage, not evidence about the server.

changelog (1 events)
datetypewhat changed
2026-09-06outcomefirst probe: ok_tools

What kind of tools these are derived

Verification only means something relative to a tool's NATURE — an email-sender has no "true answer", a generator has no answer key. Classification evidence: classified from tool names/descriptions/annotations WE OBSERVED. What checking applies to each kind (the full methodology →):

naturetoolsmeaning what checking applies
retrieval-public37serves public factstruth-checkable against a public source — the V-ladder applies in full

Tools last seen observed

berlin_borough_details berlin_boroughs berlin_conservation_area_details berlin_conservation_areas berlin_district_details berlin_districts berlin_neighborhood_details berlin_neighborhood_search berlin_neighborhoods field_metadata listing_details listings macro_bund_yields macro_construction_prices macro_ecb_policy_rates macro_gdp macro_inflation_hicp macro_labor_employment macro_labor_short_time_work macro_labor_unemployment macro_mortgage_lending market_berlin_apartment_buildings market_berlin_apartments market_germany_apartment_buildings market_germany_residential search socio_berlin_age_groups socio_berlin_census_buildings socio_berlin_census_dwellings socio_berlin_census_households socio_berlin_census_rents socio_berlin_census_vacancy socio_berlin_construction_activity socio_berlin_migration_external socio_berlin_migration_matrix socio_berlin_origin socio_berlin_population

Harness readiness observed

Can an agent's harness pick this tool and call it correctly? Graded on the three things an agent reads — name, description, typed parameters. Band B — usable, with rough edges.

legibility checktools passingok
name is clear & specific37/37
has a description37/37
description is substantive37/37
parameters are typed37/37
parameters are described6/376/37

37 of 37 tools graded · 37 with a captured input schema. RS-008, Tier-1 — no domain knowledge, applies to any tool. “Alive” is not the same as “usable”.

Truth checks observed

Not yet confirmed — 2 attempt(s) currently unverifiable (rate limits, walls, or unmappable schemas — never counted against the server) · 0 disagreements.

claim classkeyverdictprimary source
tariff-duty0901.21.00unverifiableus-hts
tariff-duty6109.10.00unverifiableus-hts

Protocol conformance observed

2025-06-18
protocol version
session model
1.65.5
server version guthmann-berlin-real-estate

Capabilities: tools

Drift observed

No confirmed drift on record. Baseline set 2026-09-06; changes appear here after human review.

raw probe records
probed (UTC) outcomehttpmsprotocol
2026-09-06T06:13:26Zok_tools2001682025-06-18

Watch or embed this verdict

verdict badge

Operators: put the live verdict in your README — it updates with every census, links back here, and is a dated observation, never a warranty:

[![Robin Saige verdict](https://robinsaige.com/badge/estate.guthmann/mcp.svg)](https://robinsaige.com/s/estate.guthmann/mcp)

Depend on it? Subscribe to its change feed — outcome changes and confirmed drift, no account needed. Building on it? The full dossier as JSON — verdict, rating, truth checks, history — stable enough to gate CI on.

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