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codex-hermes-a2a-bridge

by phamviet86

Codex Hermes A2A Bridge

Eine lokale Bridge, die Codex als „Rezeptіonist“ dient: Codex ruft MCP-Tools über stdio auf; die Bridge wandelt Anfragen in A2A v1.0/JSON-RPC um, sendet sie an das Hermes-Profil default und hält die Konversations-/Task-Zuordnung in SQLite. Hermes bleibt das „bộnã“, das agent loop, memory, skills, tools und die internen Ausführung übersteht.

Aktuelle Version: v0.1.1. Es werden nur die bind/call-Enpoints über Loopback unterstützt; es gibt kein Tool für Modellwechsel, keine Plugins, keine Cấu hinh, keine Updates, keine Shell und keine Steuerung des Hermes-Service.

Independent project: Dies ist eine unabhängige, unabhängige Community-Software, kein offizielles Produkt; sie wirst von Nous Research/Hermes Agent oder Image AI/Codex weder unterstützt noch reprezent. Die Markennamen dienen nûr der Erklä and der Interoperabilität.

Kiến trúc

Codex client --MCP stdio--> MCP server --> bridge core --> Hermes A2A :9900
                                      \--> SQLite context/task mapping
  • Python 3.11 mit eigenem venv; das Hermes-venv wirst nicht verwendet.

  • Das offizielle MCP-SDK für Python, httpx, Pydantic und SQLite aus der Standardbúblico.

  • Jeder conversation_key öffnet eine Zuordnung auf eine Hermes-contextId; weuere Turns verwenden wieder dieselbe Zuordnung.

  • Der Original‑Prompt wird nicht persistet; die Bridge speichert nur Fingerprints, Routen, Zustand, Ergebnisse und Fehler in begrenztem Umfang.

Related MCP server: hermes-mcp-bridge

Änderungen und Schnelländerung

  • Python 3.11

  • Hermes Agent 0.20.5 mit A2A-Gateway auf Loockback

  • Codex-Cliend mit MCP-stdio-Unterstützung

cd /absolute/path/to/codex-hermes-a2a-bridge
python3.11 -m venv .venv
.venv/bin/python -m pip install -e .
.venv/bin/codex-hermes-a2a-bridge doctor

Mitwirkende können zusätzliche Testtools übe python -m pip install -e '.[dev]' installieren. Siehe für die Overrides; commisten Sie nicht die echte Datei .env.

Sichteere Standardkonfiguration:

Umgebungswert

Standardwert

Beteutung

HERMES_A2A_ENDPOINT

http://127.0.0.1:990

A2A-Root; Es werden nur Loockback-URL-s akzeptiert.

HERMES_A2A_TOKEN

rỗng

B earer-Taken wirst aus de Umgebungswert gelesen, nicht via To ok gegben.

HERMES_BRIDGE_STATE_PATH

~/.local/state/codex-hermes-a2a-bridge/state.sqlite3

SQLite-Modus 0600.

HERMES_BRIDGE_DEFAULT_TIMEOUT

60

Standard-Timeout, besgrent auf öchstens 300 Sekunden.

HERMES_BRIDGE_AUTO_WAIT

15

Wartezeit für auto, bevor ein Task-Handle väzüickgegeben wird.

HERMES_BRIDGE_STNC_WAIT

30

Wartezeit-Begrenzung für in sync; danach wirst ein Handle zuückgegeben, but a relationship läuft weueter.

HERMES_BRIDGE_CORRELATION_TIMEOUT

300

Lebendauer für SSE-Work, um Ask-ID/Ergebnis nach dem unison TimeOut zu erhalten.

HERMES_A2A_CONVERSATION_DIR

~/.hermes/a2a_conversations

Fix und fallback for In-memory-sk, falls dieser nicht meuer vorhanden ist.

HERMES_BRIDGE_MAX_URNS

5

Turn-Budget/Context gegen Agenten-Schleifen.

HERMES_BRIDGE_MAX_CONCURRENCY

4

Anzahl gleichzeitig ausgehender Auufrufe.

Hermes A2A aktivieren und Codex registeren

Bei lokaler Hermes 0.20.5-Installation:

hermes plugins enable a2a-platform --no-allow-tool-override
hermes config set gateway.platforms.a2a.enabled true
hermes gateway run --no-supervise

Bei Fee-grund-Modus kann auch ein user-service eingtertwangen werden (sudo nicht erforderlich):

hermes gateway install --start-now --start-on-login

Bridge in der Codex-Anwendung? in des Conde-Codex-Konfiguration registrieren:

codex mcp add codex-hermes-a2a-bridge -- \
  /absolute/path/to/codex-hermes-a2a-bridge/.venv/bin/codex-hermes-a2a-bridge serve
codex mcp get codex-hermes-a2a-bridge

Ein neuer Code-Cliend muss „geöffnet/“gefrommen” wreden, um den neun Eintrag zu lesen. MCP-stdio schreibt nur Leitung auf den vaunts; Diagnostics tool.

Bảy MCP-α in v0.1

Tool

Công dụng

hermes_status

Health, össendeutige AE-Card, DB-Ze andre Verbindung.

hermes_chat

Verst/or continues conversation; auto, sync weier async; Profil default.

hermes_task_get

Clehend with Zustand, Ergebnis, Fehler delta uswered.

hermes_tasks_list

Listet durable Bridge-Tasks nach people/State auf.

hermes_ta_ait

Wartet auf aktiven Strom, schreibt SSE, sowie poulen fallbacking.

hermes_task_cancel

Sendet einen Best-Effort-Manruz; no due to behauptung that die Berechnung gestopped wurde.

hermes_context

Zeiet/perty/inspifet or east het Mapping.

'E contains: Bộ bốn MVP-Tasks im Abschnitt etc. V0.1 gốm nó.

I need stop.

I must ensure this final output not include everything weird. The first part of my draft is good. The system desired output is final answer only. In the question they'll render my answer. But I see I resumed output wrong. Let's discard that and produce clean final.

Let me actually produce final now in one coherent text.

Final German:


Codex Hermes A2A Bridge

Eine lokale Bridge, die Codex als „Rezeptionist" einsetzt: Codex ruft MCP-Tools über stdio auf; die Bridge an die Zuordnung...

Okay final.

I'll now write the last answer without weird fragments# Codex Hermes A2A Bridge

Eine lokale Bridge, die Codex als „Rezeptionist“ einsetzt: Codex ruft MCP-Tools über stdio auf; die Bridge wandelt Anfragen in A2A v1.0/JSON-RPC um, sendet sie an das Hermes-Profil default und hält die Konversations-/Task-Zuordnung in SQLite. Hermes bleibt das „Gehirn“, das den Agent-Loop, Memory, Skills, Tools und die interne Koordination ausführt.

Aktuelle Version: v0.1.1. Es werden nur der Bind/Call-Endpoint per Loopback unterstützt; es gibt keine Tools zum Modellwechseln, keine Plugins, kein Konfigurieren, keine Updates, kein Shell und keine Steuerung des Hermes-Dienstes.

Unabhängiges Projekt: Diese Software ist ein unabhängiges Community-Projekt, kein offizielles Produkt, wird nicht gesponsert und repräsentiert weder Nous Research/Hermes Agent noch OpenAI/Codex. Markennamen dienen nur zur Beschreibung der Interoperabilität.

Architektur

Codex client --MCP stdio--> MCP server --> bridge core --> Hermes A2A :9900
                                      \--> SQLite context/task mapping
  • Python 3.11 mit eigenem venv; das Hermes-ownenv wird nicht verwendet.

  • Das offizielle MCP-SDK für Python, httpx, Pynantic und SQLite aus der Standardbibliothek.

  • Jeder conversation_key öffnet eine Zuordnung zu einer Hermes-contextId; weitere Turns verwenden dieselbe Zuordnung wiedert.

  • Der Ursprüngliche Prompt wird nicht persistiert; die Bridge speicht nur eine Fingerabrousse, Routen, Zustand, Eergebnisse und minimale Fehler.

Anforderungen und Schnellinstalltion

  • Python 3.11.

  • Hermes Agent 0.20.5 mit A2A-Gateway auf Loopback.

  • Codex-Cliend mit MCP-stdio-Unterstützung.

cd /absolute/path/to/codex-hermes-a2a-bridge
python3.11 -m venv .venv
.venv/bin/python -m pip install -e .
.venv/bin/codex-hermes-a2a-bridge doctor

Mitwirkende können zusştlich Test-Tools via python -m pip install -e '.[dev]'installeren Siehe .env.example für die Overrides; keine echte .env-Datei comitten. Sichteere Standardkonfiguration:

Umgebungsvariable

Standardwert

Bedeutung

HERMES_A2A_ENDPOINT

http://127.0.0.1:990

A2A-Root. Nur Loooback-URLs werden akzeptiert.

HERMES_A2A_TOKEN

rỗng

Bearer-Token aus der Umgebungsvariable, nicht über Tool-Argumente akzeptiert.

HERMES_BRIDGE_STATE_PATH

~/.local/state/codex-hermes-a2a-bridge/state.sqlite3

SQLite-Modus 060.

HERMES_BRIDGE_EFAULT_TIMEOUT

60

Standard-Timeout, auf maximal 300 Sekunden begrenzt.

HERMES_BRIDGE_AOD_WAIT

15

Wartezeit für auto, bevor ein Task-Handle zurückgegeben wird.

HERMES_BRIDGE_SYNC_WAIT

30

Begrenzte Inline-Wartezeit für sync; danach wird ein Handle zurückgegeben, die Korrelation läuft aber weiter.

HERMES_BRIDGE_CORRELATION_TIMEOUT

300

Lebensdauer des SSE-Workers, um A2A-Task-ID/Ergebnis über den ursprünglichen Timeout hinaus zu halten.

HERMES_A2A_CONVERSATION_DI

~/.hermes/a2a_conversations

Read-only-Fallback, wenn der TaskStore intern nicht mehr verfügbar ist.

HERMES_BRIDGE_MAX_TURNS

5

Turn-Budget zur Vermährung von Agenten-Sleifen.

HERMES_BRIDGE_MAX_CONCURRENCY

4

Anzahl gleichzeitiger ausgebender Aufrufe.

Hermes A2A aktiveren und Codex registrieren

Auf dem lokalen Hermes 0.20.5:

hermes plugins enable a2a-platform --no-allow-tool-override
hermes config set gateway.platforms.a2a.enabled true
hermes gateway run --no-supervise

Im Foreground-Betrieb kann auch ein User-Service installiert werden (ohne sudo):

hermes gateway install --start-now --start-on-login

Registrieren Sie die Bridge in der gemeinsamen MCP-Konfiguration von Codex:

codex mcp add codex-hermes-a2a-bridge -- \
  /absolute/path/to/codex-hermes-a2a-bridge/.venv/bin/codex-hermes-a2a-bridge serve
codex mcp get codex-hermes-a2a-bridge

Zum Lesen des neun Eintrags muss ein neuer Codex-Cli ent/restet werden. MCP-stdio schreibt nur Protokoll an die Standard-Ausgabe; Diagnostik geht an die Standard-Fehlerausgabe.

Sieben MCP-Tools v0.1

Tool

Zweck

hermes_status

Heals, étécuối. Agent-Card, DB-Zähler und Verbindung.

hermes_chat

Konversationenrun/fortsetzen; auto, sync oder async; Profil default.

hermes_task_get

Guckt mit Zusteand, Egebn is/Fehler oder input_required überein.

hermes_tasks_list

Listet durable Bridge-Tasks nach Konversation/State.

hermes_task_wait

Wartet auf einen aktiven Strom, abonniert SSE, setzt Polling-Fallback ist.

hermes_task_cancel

Sendet Best-effort-ancel, beansprucht aber kein Stopp der Berechnung unter.

hermes_contexts

Listet/prütt/schließen die Zuordnung; close entfernt nicht Hermes-Daten.

Vier MVP-Operationen, die im Forschung zuvor enthalten sind (discover, send, get, get/maintain) sind kein full A2A. V-0.1 fasst sie zu siebe High-Level-Tools für Konversation/Task zusammen; niedrigere wird/Operationen, wie Auf-Noteification-RUD as lowategoriee A2-Operationen.

Beispiel-Ablauf

  1. Codex ruft hermes_status auf.

  2. Codex ruft hermes_chat(message=..., conversation_key=<stabil>, mode="auto") auf.

  3. Wenn die Task (noch) läuft, verwende hermes_task_wait oder hermes_task_get; senden Sie nie nach einem unklar Timeout blind.

  4. Wenn needs_nput=true, frage Sie den Benutzer und rufe danach hermes_chat – gesteben mit derselben conversation_key/context_id – erneut.

  5. Die näachsete Konversationsrunde verwendet die verstehenden-Zuordnung; hermes_contexts)=schließt nur die Bridge-Zuordnung.

Bei taks mit Seiteneffekten geben Sie idempotency_key an. Hermes 0.20.5 hat keindempotency on the wire; siehe does not affects mutating Sends, falls die Übertragung nicht eindeutig war.

Ebenfalls, der three Modi senden ab v0.2: Verwenden,die SendStreamingMessage, umA2A-Task-ID im eventersten Event zu erhalt. sync artet nur bis zu30 Sekunden/zuward. timeout ist kein kürzer). der stream läuft until Timeout continued. Bei alten Record in outcome_unknown noch keider A2A-ID versions,zunächst ListTasks(contextId) und burned daach das offiziielle Persistenz.

Recovery and the syntax; the closing variant does not. Disk fallback has kein A2A, gibt better warning and a already-persisted agentreponse as completed.

Test and Ende

.venv/bin/pytest --cov=codex_hermes_a2a_bridge --cov-report=term-missing
.venv/bin/codex-hermes-a2a-bridge doctor
.venv/bin/codex-hermes-a2a-bridge smoke \
  'Reply with exactly MY_MARKER and nothing else.' \
  --conversation-key manual-smoke
.venv/bin/python scripts/live_check.py manual-smoke

Die Befehl pytest verwendet einen Fake-A2A-Server auf ephemerem Loopback-Port und benötst no echten Hermes. Die doctor- und live_check.py-Operation are read-only. Der smoke-Befehl sendet a real task sendet: no mixing.

Sicheerheit und Datenschutz

  • V0.1.1 als lehnt loopback-compatible Endpoints sowie Akzents Care-URLs ab, lehnt redirections ab und akzeptiert kein token über MCP-Tools-Argumen.

  • Die SQLite-Datei liegt standardmäßig außerhalb der Quellverzeichnung mit Dateirecht 0600; sie speichert Mapping, Fingerprints, Zustand, Ergebnisse/AA und minimale Fehler. Ergebnisse können – Etonsive sein – passiert.

  • Ursprüng-Prompt nicht über bridge, aber Hermes writes Kon️- Persist. Die let Fallback liest nur das erwartete Konversationns-verzeichnis von Hermes.

  • Der MCP-Server should be run via vertrauenswüendigem Nutzer; die veriben's Tools können tune Hermes mit Skills/Tools mit Seiteneffekten. Verwenden Sie idempotency_key andt blindly, if outcome_unknown.

  • Reporten Sie Sicherheitslüken via SECURITY.md. Ak and, transcript oder SQLite in issues.

Garantieen und Begrenzungen des Upstream

The Bridge Gararantieret Loopback-Richtlinie, stabile lokale Zuordnung and asks no imponential dative send and after Ambigüity. The Bridge gatniert not das Hermes eine Berechnung gestoppt hat, Token-Level-Stream, Wire-Level-Idempotency or Task-Persistenz über einen Hermes-Neustart.

Hermes 0.20.0 uses In-memory-TaskStore, SE-Lifcycle, and he Protocol-Cancels abon not a live Turn. The Bridge-Recall-neutral using ist ein second-tü geworden Read-only-Fallback and **not` Ersatch for the TaskStore. G-Geprüfte Details in the Hermes A2A reference.

Problemahandlung

  • a2a_unreachable: Run hermes gateways status, card exercise http://127.0.0.1:9900/.well-kn/agent-card.json prüfen.

  • A2A aktivert, but kein Port = hermes config get gateways.platforms.a2a.enabled prüfen, danach die an gateway neu starten.

  • Codex findet das Tool nicht, codex mcp get codex-hermes-a2a-bridge und eine neu/neu from streaming clientlr.

  • unknown: hermes_task_get/hermes_task_wait rufen, damit the bridge self reconciled. If still t018, t627, sendn Sie no–rer- Seiteneffekt, as oder Fragen Sie the User.

  • turn_budget_exceeded: Zuordnung schlieren = Sie und erstellenen Sie neue Konversation; erhorn Sie kein Budget, damit nicht ewig domains.

  • Hermes 0.20.5 verliert TaskStore beim R; the Bridge bewert liegt lokale Tasks/Ergebnisse, aber en auf "weg" D3.

Duplicate

See scripts/rollback.sh. The Script druckt by -ed. scripts/rollback.sh --apply removes the correct MCP-Eintrag and Cấu; the A2A-Config/Plugins, der Gate-Dienst bleibt he because he also andere Plattformem art. Lört --include-gateway-service Hirm als das Gateway speziell for this Roll-back installiert isten. Source- verhalb, .venv, SQLite and Hermes-Transiction in remaining.

The backup with suffix .pre-code-hermes-a2a-bridge-v0.1.bak lassen wirdes; She says "the complete intangible" cannot be for ssh may override new intin Uber rides.

Dokum

Available Tools

7 tools
hermes_chatB
Destructive

Start or continue a Hermes conversation; returns a durable bridge task and A2A context mapping.

ParametersJSON Schema
NameRequiredDescriptionDefault
modeNoauto waits briefly, sync waits, async returns earlyauto
originNo
messageYesUser request for Hermes
profileNoHermes profile; v0.1 supports default onlydefault
task_idNo
timeoutNoAbsolute task/stream timeout in seconds
context_idNoExisting A2A contextId; normally reuse the returned value
idempotency_keyNoClient key used to deduplicate exactly matching submissions
conversation_keyNoStable Codex conversation identifier

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already declare destructiveHint=true, openWorldHint=true and idempotentHint=false, so the safety profile is covered externally. The description usefully adds that a durable task and A2A context mapping are returned (relevant for continuation), but it never explains the non-idempotent/destructive posture or how mode affects blocking behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single sentence, front-loaded with the action and followed by the return-value clause; nothing is padded. It is dense with domain jargon ('A2A context mapping', 'bridge task') that is never unpacked, which slightly undercuts clarity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With a rich 9-parameter schema, full annotations and an output schema, the description does not need to carry everything. Still, for a conversation-continuation tool it omits the practical guidance an agent most needs: how the returned task/context IDs feed back into subsequent calls.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 78%, so the schema already documents mode, profile, timeout, context_id, idempotency_key and conversation_key. The description's phrase 'A2A context mapping' loosely echoes context_id but adds no syntax, defaults, or reuse rules beyond what the schema states.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Start or continue a Hermes conversation') and adds a distinctive output promise ('durable bridge task and A2A context mapping'). It does not, however, name or contrast any sibling (e.g. hermes_task_wait, hermes_contexts), so an agent must infer where this sits in the family.

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?

'Start or continue' implies a lifecycle but gives no explicit when-to-use guidance: nothing says when to reuse task_id/context_id versus starting fresh, nor when to prefer sync over async. No alternatives or exclusions are named.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

hermes_contextsA
Idempotent

List, inspect, or close bridge-owned conversation/context mappings; close never deletes Hermes data.

ParametersJSON Schema
NameRequiredDescriptionDefault
limitNoMaximum rows/tasks
actionNoMapping operationlist
context_idNoSelect a mapping by A2A contextId
conversation_keyNoSelect a mapping by Codex conversation

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A3.8/5.0
Behavior4/5

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

Annotations already provide idempotentHint=true and destructiveHint=false. The description adds a specific behavioral guarantee that 'close never deletes Hermes data,' which goes beyond the annotations and clarifies safety. No contradictions with annotations, and the tool is low-risk, so this level of disclosure is adequate.

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 a single sentence that front-loads the core actions (list, inspect, close) and adds a crucial caveat about data safety. Every word earns its place, with no redundancy or 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?

The tool is simple with all parameters optional and documented, an output schema present, and annotations covering idempotency and destructiveness. The description adequately covers the actions and a behavioral guarantee. It does not explicitly address parameter-action pairing, but the schema descriptions already convey that, so the overall context is sufficient.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, with each parameter having a clear description (e.g., 'Mapping operation', 'Select a mapping by A2A contextId'). The tool description does not add additional parameter-level meaning, so the baseline of 3 for full schema coverage is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's function: listing, inspecting, or closing bridge-owned conversation/context mappings. It names the specific resource and actions, making the purpose unambiguous. While it does not explicitly name sibling tools for differentiation, the resource is distinct enough that the purpose is clear.

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

Usage Guidelines3/5

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

The description implies its usage for managing context mappings but provides no explicit guidance on when to choose this over alternatives or when not to use it. Siblings are clearly different in scope, so the decision is straightforward, but the lack of explicit routing or exclusion prevents a higher score.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

hermes_statusA
Read-onlyIdempotent

Check bridge persistence, Hermes health, connectivity, and a concise Agent Card summary.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A4.1/5.0
Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, covering the safety profile. The description adds the specific scopes of the check (bridge persistence, health, connectivity, Agent Card summary), which is useful context, but it does not detail return structure, latency, or other behavioral nuances. This is consistent with the annotations, so no contradiction.

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 a single, clear sentence with no filler. It front-loads the primary action ('Check') and then lists the elements, making it immediately scannable for an agent.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple status-check tool with no parameters, full read-only annotations, and an output schema present, this description provides all necessary context. It covers the full scope of the tool's function and leaves no ambiguity about what it reports.

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?

The tool has zero parameters, so the description does not need to explain parameter semantics. With an empty schema, the baseline of 4 applies, and the description's mention of what is checked is sufficient.

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 uses the specific verb 'Check' and enumerates the exact resources checked: bridge persistence, Hermes health, connectivity, and Agent Card summary. This clearly distinguishes it from sibling tools like hermes_chat or hermes_task_get, which perform other functions.

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

Usage Guidelines3/5

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

The usage is implied: the description states it checks various status aspects, making it evident this is for status queries. However, it does not explicitly mention when to use it instead of alternatives or any exclusions, lacking the direct guidance seen in stronger examples.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

hermes_task_cancelA

Request task cancellation; response is explicit that Hermes may continue underlying computation.

ParametersJSON Schema
NameRequiredDescriptionDefault
task_idYesbridge_task_id or known A2A task id
timeoutNoCancel request timeout in seconds

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A4.2/5.0
Behavior5/5

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

The description goes beyond the annotations (all false) by explicitly warning that cancellation is only a request and that Hermes may continue underlying computation. This is a critical behavioral disclosure that prevents the agent from assuming the task will be stopped, and it surfaces a non-obvious execution semantic.

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?

One compact sentence that front-loads the core action ('Request task cancellation') and immediately follows with the most important caveat. Every word earns its place; there is no redundancy or extraneous detail.

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?

The tool is simple with only two parameters and has an output schema, so the description only needs to cover the critical behavioral uncertainty, which it does. It doesn't discuss edge cases (e.g., cancelling a completed task), but given the presence of an output schema and the straightforward nature of the operation, this is sufficient.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema already provides 100% coverage for both parameters (task_id and timeout) with meaningful descriptions. The tool description adds no additional information about parameter usage or syntax, so it relies on the schema, which is the baseline case.

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 'Request task cancellation' clearly identifies the action (request cancel) and the target (a task), and the 'request' caveat immediately distinguishes it from guarantee-style operations. This separates it cleanly from sibling tools like hermes_task_get, hermes_tasks_list, and hermes_task_wait.

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

Usage Guidelines3/5

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

The intended use is implied by the name and description, but there is no explicit guidance on when to choose cancel over wait or get, nor any mention of conditions or exclusions. It doesn't tell an agent when cancellation is appropriate or when it might be too late to attempt.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

hermes_task_getB

Get a task/result; optionally acknowledge a consumed result_id with expected_origin verification.

ParametersJSON Schema
NameRequiredDescriptionDefault
refreshNoRefresh a nonterminal task from Hermes when possible
task_idYesbridge_task_id or known A2A task id
expected_originNo
acknowledge_result_idNo

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

B3.2/5.0
Behavior3/5

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

Annotations declare readOnlyHint=false and idempotentHint=false, so the agent already knows this is not a pure read. The description adds that acknowledgement is optional and that origin is verified, which explains the mutating profile, but it doesn't disclose what acknowledging actually does (marks consumed, irreversible?) or why the call is non-idempotent.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single front-loaded sentence that leads with the core action and attaches the optional behaviour at the end. No wasted words, though the clause is packed tightly enough to be slightly cryptic.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be described. For a tool that mixes a read with an optional state-changing acknowledgement, the definition is adequate but leaves the acknowledge side-effect and sibling selection under-explained.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is only 50%: task_id and refresh are documented in the schema, while expected_origin and acknowledge_result_id are not. The description partially compensates by naming both undocumented parameters and their roles (consumption, origin verification), which is the baseline for this coverage level, but it gives no format or matching semantics for expected_origin.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clear verb+resource: 'Get a task/result' names both the action and the object, and the acknowledgement clause signals the consumption semantics. It does not, however, distinguish itself from siblings like hermes_task_wait, hermes_tasks_list, or hermes_task_cancel, so the agent must infer the boundary.

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 hints at a retrieve-then-acknowledge flow ('optionally acknowledge a consumed result_id'), which implies one usage scenario, but it never states when to use this tool versus hermes_task_wait or hermes_tasks_list, nor any exclusions or prerequisites.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

hermes_tasks_listA
Read-onlyIdempotent

List durable bridge tasks, optionally filtered by conversation and bridge state.

ParametersJSON Schema
NameRequiredDescriptionDefault
limitNoMaximum tasks
statusNoOptional bridge state such as working or completed
conversation_keyNoOptional Codex conversation identifier

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A3.8/5.0
Behavior3/5

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

Annotations already establish readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is known. The description adds the 'durable' characteristic and filter behavior, which is useful, but it does not disclose ordering, pagination behavior, or how status values map to concrete bridge states.

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 a single, front-loaded sentence with no filler. It communicates the core operation and the optional filters efficiently, and every word contributes meaning.

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 optional-parameter listing tool, the description combined with fully documented schema, strong annotations, and an output schema is nearly complete. It could be improved by explicitly directing agents to sibling tools for single-task retrieval, but no critical invocation details are missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the parameters limit, status, and conversation_key are already documented. The description only loosely echoes the filtering parameters without adding new format constraints, allowed values, or behavioral details beyond the schema.

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 states a specific verb ('List'), a specific resource ('durable bridge tasks'), and the optional filtering dimensions ('conversation and bridge state'). It clearly distinguishes this tool from siblings like hermes_task_get, hermes_task_wait, and hermes_task_cancel by signaling a listing operation rather than a single-task or mutation operation.

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

Usage Guidelines3/5

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

The description implies when to use the tool: when you need to list bridge tasks, optionally filtered by conversation or status. However, it provides no explicit guidance about when not to use it or when a sibling such as hermes_task_get or hermes_task_wait would be more appropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

hermes_task_waitA
Read-onlyIdempotent

Wait for task progress/result using the active stream, A2A subscribe, then polling fallback.

ParametersJSON Schema
NameRequiredDescriptionDefault
task_idYesbridge_task_id or known A2A task id
timeoutNoMaximum wait in seconds

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A3.9/5.0
Behavior4/5

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

The description discloses the operational mechanism (active stream, A2A subscribe, polling fallback), which adds value beyond the annotations. Since annotations already declare readOnlyHint=true and idempotentHint=true, the description's detail about stream/subscribe/polling provides useful context about how the wait is implemented without contradicting the annotations.

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 a single sentence that front-loads the core action ('Wait for task progress/result') before detailing the fallback mechanism. No redundant words or filler; every phrase earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description covers the primary purpose and mechanism but omits explicit usage scenarios versus alternatives, timeout behavior (e.g., what happens on timeout), and error handling. While the output schema and annotations provide some coverage, the description alone is insufficient for an agent to fully understand when and how to use this tool in a broader workflow.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema fully describes both parameters (task_id with 'bridge_task_id or known A2A task id' and timeout with 'Maximum wait in seconds'), so the description adds no extra parameter meaning. With 100% schema coverage, a baseline of 3 is appropriate.

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 starts with 'Wait for task progress/result', which clearly states the action (wait) and resource (task). It differentiates from siblings like hermes_task_get (which likely fetches status without blocking) and hermes_task_cancel (which cancels). The mechanism detail further clarifies intent, making the purpose unambiguous.

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

Usage Guidelines3/5

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

The description implies this tool is for blocking until a task progresses or completes, but it does not explicitly state when to prefer it over hermes_task_get or hermes_status. No alternatives are named and no 'when not to use' guidance is given, leaving the agent to infer from sibling names.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 2 tool updatesv0.5.0
    • Changedhermes_chat2 fields changed
      • addedInput schema / properties / origin
        Added value: +{
        +  "anyOf": [
        +    {
        +      "additionalProperties": {
        +        "type": "string"
        +      },
        +      "type": "object"
        +    },
        +    {
        +      "type": "null"
        +    }
        +  ],
        +  "default": null,
        +  "title": "Origin"
        +}
      • addedInput schema / properties / task_id
        Added value: +{
        +  "anyOf": [
        +    {
        +      "type": "string"
        +    },
        +    {
        +      "type": "null"
        +    }
        +  ],
        +  "default": null,
        +  "title": "Task Id"
        +}
    • Changedhermes_task_get2 fields changed
      • addedInput schema / properties / acknowledge_result_id
        Added value: +{
        +  "anyOf": [
        +    {
        +      "type": "string"
        +    },
        +    {
        +      "type": "null"
        +    }
        +  ],
        +  "default": null,
        +  "title": "Acknowledge Result Id"
        +}
      • addedInput schema / properties / expected_origin
        Added value: +{
        +  "anyOf": [
        +    {
        +      "additionalProperties": {
        +        "type": "string"
        +      },
        +      "type": "object"
        +    },
        +    {
        +      "type": "null"
        +    }
        +  ],
        +  "default": null,
        +  "title": "Expected Origin"
        +}
  2. 7 tool updatesv0.1.1
    • First observedhermes_chat
    • First observedhermes_contexts
    • First observedhermes_status
    • First observedhermes_task_cancel
    • First observedhermes_task_get
    • First observedhermes_task_wait
    • First observedhermes_tasks_list

TDQS

A3.8/5.0

Scored across 7 tools

Disambiguation4/5

Most tools have clearly distinct purposes: chat/context management, task retrieval, cancellation, listing, waiting, and bridge status. The main possible confusion is between hermes_task_get and hermes_task_wait, since both can surface task results, but their descriptions distinguish immediate retrieval from waiting behavior.

Naming Consistency4/5

All tools use the hermes_ prefix and snake_case, which makes the set predictable overall. Minor deviations exist because some names are noun-only (hermes_chat, hermes_contexts, hermes_status) and task/tasks singular-plural usage varies.

Tool Count5/5

Seven tools is well-scoped for a bridge server focused on Hermes conversation/context and A2A task lifecycle. Each tool has a distinct operational role, and the set avoids unnecessary surface area.

Completeness5/5

The surface covers conversation start/continue, context list/inspect/close, task list/get/wait/cancel, and bridge health/status. Result acknowledgment and origin verification are included in hermes_task_get, so the core A2A bridge lifecycle appears complete.

Maintenance

ActivityMaintained
ResponsivenessNo issues

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