codex-hermes-a2a-bridge

by phamviet86

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Latest release: v0.1.1
Disambiguation5/5
Each tool targets a distinct concern: status/health, chat initiation/continuation, individual task retrieval, task listing, waiting on tasks, cancellation, and context management. There is no overlap in purpose, and the descriptions further clarify boundaries.
Naming Consistency5/5
All tools use a consistent 'hermes_' prefix with clear verb/noun patterns: status, chat, task_get, tasks_list, task_wait, task_cancel, contexts. The naming is predictable and follows a uniform style across the entire set.
Tool Count5/5
With 7 tools, the surface is well-scoped for a bridge server. Each tool serves a necessary function without redundancy, making the count appropriate and manageable for an agent.
Completeness5/5
The tool surface covers the full lifecycle: initiating/continuing conversations, checking status, retrieving individual tasks, listing tasks, waiting for progress/results, canceling, and managing contexts. No obvious gaps for the stated purpose of bridging Codex and Hermes.
Average 3.9/5 across 7 of 7 tools scored.
See the Tool Scores section below for per-tool breakdowns.
- No community issues in the last 6 months
- 2 commits in the last 12 weeks
- No stable releases found
- No critical vulnerability alerts
- No high-severity vulnerability alerts
- No code scanning findings
- CI is passing
This repository is licensed under Apache 2.0.
This repository includes a README.md file.
No tool usage detected in the last 30 days. Usage tracking helps demonstrate server value.
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How is the quality score calculated?

The overall quality score combines two components: Tool Definition Quality (70%) and Server Coherence (30%).

Tool Definition Quality measures how well each tool describes itself to AI agents. Every tool is scored 1–5 across six dimensions: Purpose Clarity (25%), Usage Guidelines (20%), Behavioral Transparency (20%), Parameter Semantics (15%), Conciseness & Structure (10%), and Contextual Completeness (10%). The server-level definition quality score is calculated as 60% mean TDQS + 40% minimum TDQS, so a single poorly described tool pulls the score down.

Server Coherence evaluates how well the tools work together as a set, scoring four dimensions equally: Disambiguation (can agents tell tools apart?), Naming Consistency, Tool Count Appropriateness, and Completeness (are there gaps in the tool surface?).

Tiers are derived from the overall score: A (≥3.5), B (≥3.0), C (≥2.0), D (≥1.0), F (<1.0). B and above is considered passing.

Tool Scores

Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With all annotations false, the description must carry the full behavioral burden. It discloses that the tool returns a durable task and A2A context mapping, hinting at persistence and a follow-up workflow, but it does not state side effects (e.g., that it sends a message, creates a task, or persists state) or mention synchronous vs. asynchronous behavior. That's a clear gap, though the return-value hint adds some value.
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 sentence, front-loaded with the action and key return values. No wasted words—it efficiently communicates the core purpose and output. This is an exemplar of conciseness.
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?
Despite the tool's complexity (7 params, async modes), the description is minimal. However, the rich input schema and presence of an output schema cover parameter semantics and return formats. The description omits guidance on when to use async vs. sync modes, though that lives in the mode parameter's description. Overall, it's adequate but not enriched for a tool with this many options.
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 100% — every parameter has a description (e.g., mode, context_id, idempotency_key). The tool description adds no parameter-level detail beyond what the schema already provides. Per the baseline for high coverage, this scores a 3.
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 clearly states the verb ('Start or continue') and the resource ('a Hermes conversation'), and it specifies what's returned ('a durable bridge task and A2A context mapping'). This distinguishes it from siblings like hermes_status or hermes_task_get, which focus on inspecting tasks rather than initiating interaction.
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 that this tool is the entry point for sending messages to Hermes, but it gives no explicit guidance on when to use it versus alternatives (e.g., when to call hermes_status or hermes_task_get instead). The context is clear but lacks exclusions or references to sibling tools, so it stays at an adequate level.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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.
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.
Behavior3/5
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds output context (status, result, input request, lifecycle events) but does not disclose behavioral details such as the refresh side effect, which is only mentioned in the schema. Credit is limited because the description adds only mild behavioral nuance beyond 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, well-structured sentence that front-loads the core action and the returned data. Every word earns its place, with zero waste or repetition of schema details.
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?
The tool is simple: one required ID parameter, an output schema exists, and annotations cover safety. The description states the purpose and what is returned, which is sufficient for an agent to call it correctly without needing to infer missing information.
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% for both parameters (task_id and refresh), so the description is not required to compensate. It mentions 'bridge task' which loosely maps to task_id, but does not add any meaning beyond what the schema already provides. Baseline 3 applies.
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 ('Get'), a specific resource ('one bridge task'), and enumerates the exact data returned ('Hermes status/result/input request, and recent lifecycle events'). This clearly differentiates it from siblings like hermes_tasks_list (which lists tasks) and hermes_task_cancel (which cancels tasks).
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?
Usage is implied: fetch detail for a single task when you have its ID. However, the description does not explicitly name alternative tools or state when not to use it, leaving the agent to infer the distinction from sibling names. No exclusions or alternatives are given.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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.
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.
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.

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