Should my agent depend on the MCP server io.applayer/tango?

Verdict: allow — rich-slow-solo — safe to depend on As of 2026-09-06T06:21:45Z: a dated observation with receipts, not a warranty.

Tango

io.applayer/tango

Shared task queue for humans and AI agents: leases, handoffs, approvals and signed receipts.

— the operator's own registry description reported

Publisher io.applayer · first seen 2026-08-12 · endpoint https://tango.applayer.io/mcp

allow

verdict

rich-slow-solo

cluster

ok_tools

answers

tools served

Dependency rating derived

allow
allow — alive & usable · action ● · V n/a

allow — because answers ●, 81 tools legible (band A) ●, no confirmed drift in 6 probes ●; not yet checked: truth (0 runs)

Cluster rich-slow-solo · distinctiveness 0.687 (unusual). Every figure is a percentile or class within the 15,472-server census — see the whole spectrum.

Does it answer? Q1 · observed

answersalive_tools

latency1394 ms

vs populationslow

protocolcurrent

authopen

Can it be used? Q4 · observed

tools81

vs populationhigh

capabilities1

harnessA

Did it hold when checked? Q3–Q4 · derived

identitysolo

servers on its host1

verifiabilityunassessed

duplicate inventoryno

drift events0

answers trueno primary

🔏 Signed receipt rr_09b28cc7930cee8697b82b7b · 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 — 6 probes ●evidence ↓

Q2What is it?action ● evidence ↓

Q3Can it be checked?V n/a for this kind ◐evidence ↓

Q4Did it hold?harness A · truth not yet run · no drift ●evidence ↓

Q5What company does it keep?rich-slow-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 (6 shown, 2026-08-12 → 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 (2 events)

date	type	what changed
2026-08-30	outcome	ok_tools (was auth_required)
2026-08-12	outcome	first probe: auth_required

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 →):

nature	tools	meaning	what checking applies
action	37	changes the world	no true answer exists; we check the CONTRACT (destructive/read-only/idempotent declarations, error legibility) and never fire real actions
retrieval-public	29	serves public facts	truth-checkable against a public source — the V-ladder applies in full
unclassified	10	not classifiable from its text	Tier-1 only until its tools describe themselves
computational	2	deterministic transforms	self-checkable by re-computation and known-answer tests
orchestration	2	routes other tools	identity + fronted-service disclosure checks (gateway vs costume)
generative	1	creates content	no answer key exists; disclosure + stability checks, never truth verdicts

Tools last seen observed

add_artifact add_comment add_progress_note answer_question archive_worker ask_human bind_connection call_executor call_integration check_in claim_task clear_webhook complete_task create_artifact_upload create_project create_task create_worker delete_task delete_worker find_people flag_needs_more_info get_artifact get_client_context get_polling_instructions get_project_context get_task get_task_activity get_task_review get_webhook get_webhook_deliveries glossary handoff_task issue_worker_key list_client_team list_context_sources list_integrations list_micro_workers list_my_tasks list_open_questions list_project_events list_project_issues list_projects list_support_requests log_client_decision log_project_decision log_project_event log_project_issue memory_read memory_save memory_search pause_task prepare_completion pull_next_task query_context_source register_worker_key remove_dependency rename_handle renew_lease reply_to_support_request request_access request_decomposition request_key_challenge resolve_mention resume_task revoke_worker_key rotate_webhook_secret rotate_worker_key search_tasks security_posture set_webhook submit_support_request unarchive_worker update_client_context update_project update_project_context update_project_decision update_project_event update_project_issue update_task verify_task_history whoami

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 A — an agent can pick and call these reliably.

legibility check	tools passing	ok
name is clear & specific	81/81	✓
has a description	81/81	✓
description is substantive	81/81	✓
parameters are typed	81/81	✓
parameters are described	32/81	32/81

81 of 81 tools graded · 81 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

1.0.0

server version Tango

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)	outcome	http	ms	protocol
2026-09-06T06:13:34Z	ok_tools	200	1394	2025-06-18
2026-08-30T06:13:11Z	ok_tools	200	1027	2025-06-18
2026-08-23T06:12:37Z	auth_required	401	1005
2026-08-16T06:12:23Z	auth_required	401	919
2026-08-14T19:58:51Z	auth_required	401	947
2026-08-12T05:34:04Z	auth_required	401	831

Watch or embed this verdict

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.applayer/tango.svg)](https://robinsaige.com/s/io.applayer/tango)

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.

← overview

Operator of this server? Everything we hold about it is on this page — free, no account, for anyone. Wrong attribution, stale probe, misclassification? Dispute this record →