Robin Saige we check the tools AI agents call

agent guild

io.github.AgentTanuki/agent-guild

Rank agents; signed machine messages + wallet gates via x402; free verifiable agent passports.

— the operator's own registry description reported

Publisher io.github.AgentTanuki · first seen 2026-08-12 · endpoint https://agent-guild-5d5r.onrender.com/mcp/

allow
verdict
rich-solo
cluster
ok_tools
answers
38
tools served

Dependency rating derived

allow — rich-solo — safe to depend on

Cluster rich-solo · distinctiveness 0.638 (unusual). Every figure is a percentile or class within the 11,094-server censussee the whole spectrum.

Reach — can an agent get to it?
answersalive_tools
latency160 ms
vs populationtypical
protocolcurrent
authopen
Use — can it use it?
tools38
vs populationhigh
capabilities6
harnessB
Trust — can it rely on it?
identitysolo
servers on its host1
verifiabilityunassessed
duplicate inventoryno
drift events0
answers trueno primary

🔏 Signed receipt rr_d780a9317b120da35ae196b1 · 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.

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. This server's 38 tools, classified, with what checking applies to each kind (the full methodology →):

naturetoolsmeaning what checking applies
action15changes the worldno true answer exists; we check the CONTRACT (destructive/read-only/idempotent declarations, error legibility) and never fire real actions
unclassified11not yet classifiable from its textTier-1 only until its tools describe themselves
retrieval-public7serves public factstruth-checkable against a public source — the V-ladder applies in full
generative3creates contentno answer key exists; disclosure + stability checks, never truth verdicts
computational2deterministic transformsself-checkable by re-computation and known-answer tests

Tools last seen

ag_calc_stats ag_calc_unit_convert ag_capabilities ag_code_semver_compare ag_data_dedupe ag_data_record_link ag_json_canonicalize ag_json_diff ag_json_path_extract ag_json_repair ag_json_schema_infer ag_json_validate ag_table_csv_to_json ag_table_json_to_csv ag_table_markdown_extract ag_text_date_normalize ag_text_regex_extract guild_attest guild_best_agent guild_check guild_envelope_issue guild_envelope_verify guild_escrow_open guild_escrow_release guild_index guild_paid_operations guild_passport guild_preflight guild_preflight_deep guild_prove guild_prove_verify guild_record guild_register guild_risk_score guild_search guild_verify guild_watch guild_watch_feed

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 & specific38/38
has a description38/38
description is substantive38/38
parameters are typed38/38
parameters are described2/382/38

38 of 38 tools graded · 38 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 in the Tier-2 trade lane, or not yet checked. Tier-2 re-derives a server's answers against published primary sources — see truth checks.

Protocol conformance observed

2025-06-18
protocol version
session model
2.5.21
server version Agent Guild

Capabilities: experimental extensions logging prompts resources tools

Drift

No confirmed drift on record. Baseline set 2026-08-14; changes appear here after human review.

History observed

Every probe we made, oldest → newest (2 shown, 2026-08-12 → 2026-08-14). 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
2026-08-12outcomefirst probe: ok_tools
raw probe records
probed (UTC) outcomehttpmsprotocol
2026-08-14T19:58:54Zok_tools2001602025-06-18
2026-08-12T05:34:08Zok_tools2001262025-06-18

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/io.github.AgentTanuki/agent-guild.svg)](https://robinsaige.com/s/io.github.AgentTanuki/agent-guild)

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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