一个开源的 Model Context Protocol 服务器，为 AI 助手提供完整的 FPGA 工具链——包括代码检查、仿真、综合、布局布线、比特流烧录，以及一个由 GitHub 支持的实时 IP 核注册表。
你可以让 AI 搜索 IP 核、将其拉取到本地、检查 HDL 代码、从磁盘综合多文件 VHDL 或 Verilog 项目、运行仿真，然后将比特流烧录到你的开发板上——所有操作都无需离开聊天窗口。
多语言支持：Verilog、SystemVerilog 和 VHDL（通过 ghdl-yosys-plugin）
三种输入模式：内联 code 字符串、多文件 files 字典，或磁盘上的 project_dir 路径
文件列表支持：支持 files.f/sources.f，包含 +incdir+、+define+ 和嵌套的 -f 指令
开发板预设：内置 11 种开发板（iCEBreaker、ULX3S、TinyFPGA BX、Tang Nano 等）——自动设置目标/器件/封装/时钟
约束自动检测：自动在项目目录中查找 .pcf/.lpf/.pdc/.cst 文件
比特流烧录：通过 iceprog (iCE40) 或 openFPGALoader (ECP5/Gowin/Nexus) 进行烧录
仿真结果解析：支持 PASS/FAIL/UVM 模式检测及 VCD 信号摘要
后台构建：支持长时间运行的综合/布局布线任务，具备状态轮询功能，并严格限制仅允许 EDA 命令
IP 核注册表：通过 GitHub 实时搜索和导入，支持 FuseSoC CAPI2 元数据
健康检查：检测已安装并可用的 OSS CAD Suite 工具
Related MCP server: Vibe Coder MCP Server
Your AI assistant <--> fpgaZeroMCP (stdio MCP server) <--> OSS tools
|
cores/ registry on GitHub
(uart_tx, fifo + any imported)MCP 服务器作为本地子进程运行。你的 AI 通过 JSON-RPC (stdio) 调用其工具。服务器会调用 OSS CAD Suite 中的 Yosys、nextpnr、iverilog、Verilator 等工具，并能直接从 GitHub 拉取开源 FPGA IP 核。
要求 | 说明 |
Python 3.11+ | |
一键下载包，包含 iverilog、Yosys、nextpnr、Verilator、Verible、GHDL | |
可选 — 仅在使用 LiteX 工具时需要 |
安装后将 OSS CAD Suite 添加到你的 PATH 中。如果缺少某个工具，所有工具包装器都会优雅地降级。
GitHub API 请求默认不进行身份验证，并受速率限制。设置个人访问令牌以提高限制：
# Linux/macOS
export GITHUB_TOKEN=ghp_...# Windows (PowerShell)
$env:GITHUB_TOKEN = "ghp_..."git clone https://github.com/lcapossio/fpgaZeroMCP
cd fpgaZeroMCP
pip install -e .添加到 claude_desktop_config.json：
{
"mcpServers": {
"fpgaZeroMCP": {
"command": "python",
"args": ["/path/to/fpgaZeroMCP/server.py"],
"env": { "PYTHONPATH": "/path/to/fpgaZeroMCP" }
}
}
}添加到工作区中的 .vscode/mcp.json：
{
"servers": {
"fpgaZeroMCP": {
"type": "stdio",
"command": "python",
"args": ["/path/to/fpgaZeroMCP/server.py"],
"env": { "PYTHONPATH": "/path/to/fpgaZeroMCP" }
}
}
}添加到你的 MCP 设置中（Settings → MCP Servers）：
{
"fpgaZeroMCP": {
"command": "python",
"args": ["/path/to/fpgaZeroMCP/server.py"],
"env": { "PYTHONPATH": "/path/to/fpgaZeroMCP" }
}
}“帮我找一个 I2C 主机 IP 核并导入它。”
“综合 ~/projects/my_fpga 中的 VHDL 文件，并告诉我 LUT 的数量。”
“为 iCEBreaker 开发板对我的项目进行布局布线，然后烧录它。”
“使用种子值 42 运行布局布线，以尝试获得更好的时序。”
“检查这段 Verilog 代码并修复所有错误。”
“仿真这个 FIFO，并告诉我测试平台是否通过。”
“格式化这个 SystemVerilog 文件。”
“我安装了哪些 OSS CAD Suite 工具？”
工具 | 说明 |
| 通过 iverilog (V/SV) 或 GHDL (VHDL) 进行语法/错误检查 — 单文件 |
| 同时检查多个文件，以解析跨模块引用 |
| 结构化的逐行诊断 — Verilator → verible 回退 (V/SV)，GHDL (VHDL) |
| 通过 verible-verilog-format (V/SV) 或 vsg (VHDL) 自动格式化 |
工具 | 说明 |
| 编译并运行测试平台 — iverilog (V/SV) 或 GHDL (VHDL)。返回结果 + VCD 摘要 |
| 带有资源统计的 Yosys 综合。接受 |
| Yosys + nextpnr 一步完成。支持开发板预设、约束自动检测、比特流输出 |
| 通过 |
| 枚举内置开发板预设（目标/器件/封装/时钟） |
工具 | 说明 |
| 浏览本地注册表，按类别过滤 |
| 获取 IP 核的清单和 HDL 源码 |
| 获取参数化实例化代码片段 + 源文件 |
| 在 GitHub 上搜索 MIT 许可的 FPGA IP 仓库 |
| 将 GitHub 仓库下载到本地注册表 |
| 导入本地 FuseSoC CAPI2 |
工具 | 说明 |
| 使用 |
| 生成 LiteX SoC 而不构建门控逻辑 |
| 使用完全自定义的参数运行 LiteX 开发板目标 |
工具 | 说明 |
| 在后台启动长时间运行的命令（仅限白名单中的 EDA 工具） |
| 检查进度 — 状态、已用时间、解析的阶段/利用率/时序 |
| 列出所有跟踪的构建（运行中和已完成） |
| 终止正在运行的后台构建 |
| 按时长和总大小删除旧的构建日志 |
工具 | 说明 |
| 报告已安装的 OSS CAD Suite 工具，包括路径和版本 |
| 在不重启服务器的情况下重新扫描 IP 核目录 |
IP 核位于 cores/<name>/ 目录下 — 包含一个 core.json 清单和一个或多个 HDL 文件。服务器在启动时会自动发现它们，并在每次导入后重新加载。
内置了两个参考 IP 核（uart_tx，fifo）以演示格式。此注册表不打算在此处无限增长 — 它由 GitHub 提供支持。
# Find a RISC-V softcore
search_github_cores("riscv softcore", language="verilog")
# Pull it in
import_github_core("YosysHQ/picorv32")
# It is now in the local registry
get_ip_core("picorv32")
generate_ip("picorv32", {"COMPRESSED_ISA": 1})服务器在仓库中找到 FuseSoC CAPI2 元数据（.core 文件）时会自动使用它，从而提供更丰富的参数和端口信息。仅接受具有 允许的许可证 的仓库。
请勿提交 PR 将 IP 核添加到此仓库。 相反：
在 GitHub 上发布你的 HDL 仓库，添加 fpga 主题并使用 MIT 许可证
可选：添加一个 FuseSoC CAPI2 .core 文件以获取更丰富的元数据
任何人都可以直接使用 import_github_core("you/your-core") 进行导入
这保持了服务器的精简，并让社区在 GitHub 上有机增长。
目标 | 厂商 / 系列 | 完整 OSS P&R |
| Lattice iCE40 | 是 — nextpnr-ice40 |
| Lattice ECP5 | 是 — nextpnr-ecp5 |
| Lattice Nexus (CrossLink-NX, CertusPro-NX) | 是 — nextpnr-nexus |
| Gowin | 是 — nextpnr-gowin |
| Xilinx / AMD | 仅综合 |
| Intel / Altera | 仅综合 |
| 技术无关 | 仅网表 |
place_and_route 的常见器件/封装值：
目标 | 器件 | 封装 |
ice40 |
|
|
ecp5 |
|
|
nexus |
| (嵌入在器件字符串中) |
gowin |
| (嵌入在器件字符串中) |
LiteX 是一个 Python SoC 框架，可以针对许多 FPGA 开发板。fpgaZeroMCP 提供了三个专门的 LiteX 工具，并且在 synthesize 和 place_and_route 中也接受 backend="litex" 参数。
# Dedicated tools
litex_build(board="arty", args=["--build"])
litex_soc(board="arty", args=["--no-compile"])
litex_flow(board="arty", args=["--build", "--output-dir", "build_arty"])
# As a backend in existing flow tools
synthesize(code="...", top_module="top", backend="litex", litex_board="arty")
place_and_route(code="...", top_module="top", target="ice40", device="hx1k",
backend="litex", litex_board="arty", litex_args=["--build"])你可以通过两种方式将注册表指向你自己的本地 HDL 目录：
环境变量：
Linux/macOS (冒号分隔)：
export USERCORES_PATH=/home/you/my-cores:/home/you/work-coresWindows (分号分隔，PowerShell)：
$env:USERCORES_PATH = "C:\Users\you\my-cores;C:\Users\you\work-cores"配置文件 (~/.fpgazero_mcp/config.json)：
{
"core_paths": [
"/home/you/my-cores",
"/home/you/work-cores"
]
}所有路径在启动时都会与内置的 cores/ 目录一起扫描。
默认情况下，import_github_core 接受具有以下 SPDX 许可证之一的仓库：
MIT, BSD-2-Clause, BSD-3-Clause, Apache-2.0, ISC, GPL-2.0, GPL-3.0, LGPL-2.1, LGPL-3.0使用 FPGAZERO_ALLOWED_LICENSES 环境变量（逗号分隔的 SPDX ID）进行覆盖：
# Linux/macOS
export FPGAZERO_ALLOWED_LICENSES=MIT
export FPGAZERO_ALLOWED_LICENSES=MIT,Apache-2.0# Windows (PowerShell)
$env:FPGAZERO_ALLOWED_LICENSES = "MIT"
$env:FPGAZERO_ALLOWED_LICENSES = "MIT,Apache-2.0"许可证 ID 遵循 SPDX 规范。检查在导入时进行；search_github_cores 会返回所有结果，无论许可证如何，以便你在导入前进行评估。
pip install -e ".[dev]"
python -m pytest tests/ -v某些测试需要 PATH 中存在 OSS CAD Suite 工具。缺少必要工具的测试会自动跳过。
变量 | 说明 |
| GitHub 个人访问令牌 — 提高 API 速率限制 |
| 额外的 IP 核搜索目录（使用操作系统路径分隔符分隔） |
| 用于 |
| 覆盖临时工作区根目录 |
| 操作系统路径分隔符分隔的额外目录列表， |
Python API 可以直接使用，无需 MCP 客户端：
from registry.resolver import CoreRegistry
from tools.lint import lint_hdl
reg = CoreRegistry()
# Import a core from GitHub
reg.import_github_core("ben-marshall/uart")
# Generate a parameterized instantiation
result = reg.generate_ip("uart", {"CLKS_PER_BIT": 868})
print(result["instantiation"])
# Lint some HDL
lint_hdl(open("my_design.v").read())python example.py # runs the built-in demo{
"name": "my_core",
"version": "1.0.0",
"description": "...",
"author": "you",
"license": "MIT",
"language": "verilog",
"category": "communication",
"tags": ["spi", "serial"],
"parameters": {
"DATA_WIDTH": { "type": "integer", "default": 8, "description": "..." }
},
"ports": {
"clk": { "direction": "input", "width": 1, "description": "System clock" }
},
"files": ["my_core.v"]
}Leonardo Capossio (bard0) — hello@bard0.com
MIT — 参见 LICENSE。
Format HDL source code and return the result. Verilog/SystemVerilog: uses verible-verilog-format. VHDL: uses vsg (pip install vsg). Returns the formatted code and whether it changed.
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | HDL source code to format | |
| language | No | HDL language variant | verilog |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description discloses that the tool returns formatted code and a change indicator, and names the underlying formatters. However, since no annotations are provided, the description bears full burden; it does not explicitly state whether the tool modifies files or is read-only, nor does it cover potential side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise: three sentences front-load the main action and provide key details without redundancy. Every sentence adds value.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With only two parameters having full schema coverage and no output schema, the description explains the return value and underlying tools. It could mention installation requirements or side effects but is sufficiently complete for a low-complexity tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema covers both parameters with descriptions (100% coverage). The description adds context about the formatters used per language but does not provide additional semantic details beyond the schema, warranting a baseline score of 3.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: formatting HDL source code and returning the result. It specifies the tools used for Verilog/SystemVerilog and VHDL, distinguishing it from sibling tools like lint_hdl and synthesize.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies that the tool should be used to format HDL code but provides no explicit guidance on when to use it versus alternatives like lint_hdl for linting. No exclusions or prerequisites are mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Generate a parameterized instance of an IP core. Returns the HDL source files and a ready-to-paste Verilog instantiation snippet with the requested parameter values applied.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | Core name, e.g. 'uart_tx' or 'fifo' | |
| parameters | No | Parameter overrides, e.g. {"CLKS_PER_BIT": 434} | |
| instance_name | No | Verilog instance name (default: <core_name>_inst) |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must fully disclose behavioral traits. It mentions the return type (HDL files and snippet) but omits side effects, permission requirements, error handling, or whether the tool consumes external resources. Without annotations, this lack of safety and behavioral detail is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences, no fluff, front-loaded with action and output. Every sentence is informative and earns its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no output schema and moderate complexity (3 params, one nested object), the description covers the basic purpose and return type but lacks details on expected structure of HDL files, error conditions, and dependencies. It is adequate but leaves gaps that could mislead an agent.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline is 3. The description adds minimal value ('with the requested parameter values applied') and does not elaborate on the 'parameters' object structure or validation rules beyond the schema. No additional semantic guidance is provided.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb ('Generate') and resource ('parameterized instance of an IP core'), clearly stating the output: 'HDL source files and a ready-to-paste Verilog instantiation snippet'. This distinguishes it from sibling tools like get_ip_core (which likely retrieves without generating) and list_ip_cores (which lists cores).
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit guidance on when to use this tool versus alternatives. With many sibling tools (e.g., get_ip_core, list_ip_cores, import_*), the description fails to mention scenarios where other tools would be more appropriate, leaving the agent to infer usage context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Return structured lint diagnostics (line, column, severity, message) for HDL source. Verilog/SystemVerilog: uses Verilator (primary) with verible-verilog-lint as fallback. VHDL: uses GHDL. All tools are part of OSS CAD Suite.
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | HDL source code | |
| language | No | HDL language variant | verilog |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses the toolchain (Verilator with fallback, GHDL) and mentions OSS CAD Suite, which is helpful. However, it lacks information on side effects, error behavior, required permissions, or performance implications. The read-only nature is implied but not stated.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is extremely concise with two sentences, no redundant information. The first sentence defines purpose and output structure, the second provides toolchain details. Every sentence earns its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the lack of an output schema, the description compensates by listing the output fields (line, column, severity, message). It also explains language-tool mapping. However, it does not address error cases or tool availability, but overall it is fairly complete for a diagnostic tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema provides 100% coverage with descriptions for both parameters. The description adds no additional parameter-level meaning beyond what the schema already conveys. Baseline score of 3 is appropriate as the description does not enhance parameter understanding.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool returns structured lint diagnostics with specific fields (line, column, severity, message). It identifies the resource as 'HDL source' and distinguishes by specifying the toolchain per language. However, it does not explicitly differentiate from sibling tools like 'lint_hdl' or 'lint_project', leaving room for ambiguity.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided on when to use this tool versus alternatives. It does not mention when not to use it, prerequisites, or context. The sibling list includes similar tools like 'lint_hdl', but the description offers no basis for selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Fetch the full manifest and HDL source files for a named IP core.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | Core name, e.g. 'uart_tx' or 'fifo' |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must fully convey behavioral traits. It only states the action but does not disclose whether the tool is read-only, any required permissions, side effects, or output format. This is insufficient for a fetch operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, concise sentence that front-loads the purpose. No extraneous words, every part adds value.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With no output schema or annotations, the description is somewhat limited. It explains what the tool does but does not specify what is returned (e.g., raw files, metadata). For a simple fetch, it is minimally adequate but could provide more context about expected output.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema provides a complete description for the only parameter 'name' (e.g., core name with examples). The description adds no additional meaning beyond the schema, so baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb ('Fetch') and identifies the resource ('full manifest and HDL source files') and the input ('named IP core'). It clearly distinguishes from siblings like 'list_ip_cores' and 'generate_ip'.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this tool vs alternatives such as 'search_github_cores' or 'import_fusesoc_core'. The description does not mention prerequisites or when it is appropriate to use.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Import a local FuseSoC CAPI2 .core file into the registry. HDL files referenced in the .core file must exist in the same directory. Useful when you already have FuseSoC cores checked out locally.
| Name | Required | Description | Default |
|---|---|---|---|
| path | Yes | Absolute or relative path to the .core file |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description provides one behavioral constraint: HDL files must exist in same directory. However, it does not disclose side effects, idempotency, or what 'registry' entails.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise: two sentences directly stating purpose, requirement, and use case. No unnecessary words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple tool with one parameter and no output schema, the description provides sufficient context: purpose, prerequisite (HDL files in same dir), and use case. Minor gap: no explanation of registry impact.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so description is not required to add much. It merely restates the parameter's purpose without further detail, maintaining baseline.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool imports a local FuseSoC CAPI2 .core file into the registry, specifying the file format and local nature, distinguishing it from sibling like import_github_core.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description includes 'Useful when you already have FuseSoC cores checked out locally,' implying when to use and distinguishing from remote imports, though it doesn't explicitly list alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Download an MIT-licensed GitHub repository and add it to the local IP core registry. Automatically uses FuseSoC CAPI2 metadata (.core file) if one exists in the repo. After import, the core is immediately available via get_ip_core and generate_ip.
| Name | Required | Description | Default |
|---|---|---|---|
| repo | Yes | GitHub repo in 'owner/repo' format, e.g. 'ultraembedded/core_uart' | |
| subdir | No | Subdirectory within the repo to scope HDL search (for monorepos) | |
| ref | No | Branch, tag, or commit SHA (default: repo's default branch) |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden and does well by disclosing key behaviors: it downloads repos, automatically uses FuseSoC CAPI2 metadata, adds to a local registry, and makes the core immediately available via other tools. It mentions the MIT license constraint and post-import availability, which are not obvious from the schema. However, it lacks details on error handling, rate limits, or authentication needs.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with the core purpose in the first sentence, followed by implementation details and post-import effects. Every sentence adds value (e.g., MIT license, FuseSoC metadata, availability via other tools) with zero waste, making it efficient and well-structured.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (a tool that downloads, processes, and registers repos) and no annotations or output schema, the description is mostly complete. It covers the purpose, behavior, and outcomes, but lacks details on error cases (e.g., what happens if the repo isn't MIT-licensed or lacks a .core file) and doesn't describe the return value, which is a gap since there's no output schema.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents all three parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema (e.g., it doesn't explain parameter interactions or default behaviors like 'ref' defaulting to the repo's branch). Baseline 3 is appropriate as the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Download an MIT-licensed GitHub repository and add it to the local IP core registry') and distinguishes it from siblings like 'import_fusesoc_core' (which likely imports from a different source) and 'search_github_cores' (which only searches). It explicitly mentions the verb+resource combination with the MIT license constraint.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool (to import GitHub repos with MIT licenses and FuseSoC metadata) and implies an alternative ('import_fusesoc_core' for non-GitHub sources). However, it doesn't explicitly state when NOT to use it (e.g., for non-MIT repos or without .core files) or compare it to 'search_github_cores' for discovery vs. import.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Lint HDL source code using iverilog (Verilog/SystemVerilog) or ghdl (VHDL). Returns warnings and errors so you can fix them before synthesis.
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | HDL source code to lint | |
| language | No | HDL language variant | verilog |
| top_module | No | Top-level module name (optional) |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It describes the tool's function (linting), tools used (iverilog/ghdl), and output (warnings/errors), but lacks details on error handling, performance, or side effects. It doesn't contradict annotations, but could benefit from more behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded and concise with two sentences that efficiently convey purpose, method, and outcome. Every sentence earns its place without redundancy, making it easy for an AI agent to parse quickly.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no annotations and no output schema, the description adequately covers the tool's purpose and basic behavior. However, for a tool with 3 parameters and no structured output information, it could be more complete by detailing output format or error cases, though it's sufficient for a linter tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema fully documents all parameters. The description adds no additional parameter semantics beyond what's in the schema (e.g., it doesn't explain 'top_module' usage or language-specific nuances). Baseline 3 is appropriate as the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose with specific verbs ('lint HDL source code') and resources ('using iverilog or ghdl'), distinguishing it from siblings like format_hdl, simulate, or synthesize. It explicitly mentions the languages supported (Verilog/SystemVerilog/VHDL) and the outcome ('returns warnings and errors').
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool ('so you can fix them before synthesis'), implying it's a pre-synthesis step. However, it doesn't explicitly state when not to use it or name alternatives among siblings like get_diagnostics or simulate, which might offer overlapping functionality.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
List all available IP cores in the registry. Optionally filter by category.
| Name | Required | Description | Default |
|---|---|---|---|
| category | No | Filter by category, e.g. 'communication' or 'memory' |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, description carries burden—but only states listing operation. Does not disclose return format, pagination, rate limits, or side effects. Adequate for a simple query, but could add context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence with no filler. Essential information is front-loaded. Every word earns its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Adequate for a simple list tool with no output schema and no annotations. Missing details like return format or empty-state behavior, but contextually complete enough given simplicity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with schema describing 'category' as filter. Description merely restates filtering without added detail. Baseline score of 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Clearly states verb (list), resource (IP cores in registry), and optional filtering by category. Distinct from siblings like get_ip_core or search_github_cores due to registry scope.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Implies usage for listing all cores or filtered by category, but provides no explicit guidance on when to use this vs. alternatives like get_ip_core or search_github_cores. No exclusions mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Run LiteX board target with --build. Returns logs and output directory.
| Name | Required | Description | Default |
|---|---|---|---|
| board | Yes | LiteX board target | |
| args | No | Extra LiteX CLI args | |
| output_dir | No | Optional output directory | |
| timeout | No | Timeout in seconds |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must fully disclose behavior. It states it runs a build and returns logs and an output directory, but does not reveal side effects (e.g., file creation, duration), required permissions, or error handling. This is insufficient for a build tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single concise sentence, front-loading the core action. However, it may be overly minimal; slightly more detail could enhance clarity without losing conciseness.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (4 parameters, no output schema, no annotations), the description lacks completeness. It does not explain return format, timeout behavior, or effect of optional args. The tool's behavior is only partially described.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
All 4 parameters are described in the input schema (100% coverage). The tool description adds no further semantics beyond what the schema provides, so a baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action (Run) and resource (LiteX board target) with the specific flag --build. It also mentions outputs (logs and output directory). While it doesn't explicitly distinguish from siblings like litex_flow or start_build, the purpose is specific and unambiguous.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided on when to use this tool versus alternatives like litex_flow or start_build. There is no mention of prerequisites, context, or exclusions, leaving the agent without direction.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Run a generic LiteX board target with caller-provided args.
| Name | Required | Description | Default |
|---|---|---|---|
| board | Yes | LiteX board target | |
| args | No | Extra LiteX CLI args | |
| timeout | No | Timeout in seconds |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description must disclose behavior. It does not mention if the tool is blocking, what side effects occur (e.g., writing to disk), permission requirements, or how output is handled. Minimal transparency beyond purpose.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence, no redundancy. Every word adds meaning. Efficient for a generic tool.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 24 siblings and no output schema, the description is adequate for a simple runner but could mention typical use case (e.g., for prototyping or custom builds). Nearly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline is 3. The description adds 'caller-provided args' but does not explain how args interact with board target or provide examples. No extra semantic value beyond schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states it runs a generic LiteX board target with caller-provided args. The verb 'Run' and resource 'LiteX board target' are specific, and it distinguishes from siblings like litex_build and litex_soc by being generic.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Description implies usage for running arbitrary board targets with extra args, but does not specify when to use this tool over siblings like litex_build or simulate. No explicit alternative or exclusion guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Generate LiteX SoC without building gateware. Returns logs and output directory.
| Name | Required | Description | Default |
|---|---|---|---|
| board | Yes | LiteX board target | |
| args | No | Extra LiteX CLI args | |
| output_dir | No | Optional output directory | |
| timeout | No | Timeout in seconds |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses that gateware is not built and that logs and output directory are returned, but lacks details on side effects, permissions, or constraints.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Description is a single, front-loaded sentence that efficiently conveys the core action and return values. No wasted words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with 4 parameters and no output schema, the description provides basic purpose and return type. However, it lacks context on prerequisites, file system effects, or error conditions, which would be helpful for completeness.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so parameters are already documented. The description adds no additional meaning beyond the schema; it does not explain how parameters like 'board' or 'args' affect generation.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states the tool generates a LiteX SoC without building gateware, distinguishing it from sibling tools like litex_build which actually builds gateware. The verb 'generate' and resource 'LiteX SoC' are specific.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Description implies usage when you want to generate a SoC without building gateware, but does not explicitly state when to use or when not to use. No alternatives are mentioned, 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.
Synthesize Verilog with Yosys then place-and-route with nextpnr in one step. If backend=litex, runs LiteX build and ignores Verilog inputs. Returns max frequency, critical path, resource utilization, and full logs. Supported targets: ice40, ecp5, nexus, gowin. Common device/package values: ice40: device=hx1k|hx8k|up5k|lp1k package=tq144|qn84|sg48|cm81 ecp5: device=25k|45k|85k package=CABGA256|CABGA381 nexus: device=LIFCL-40-9BG400C (package embedded in device string) gowin: device=GW1N-UV4LQ144C6/I5 (package embedded in device string)
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | Verilog source code | |
| top_module | Yes | Top-level module name | |
| target | Yes | FPGA family | |
| device | Yes | Device variant, e.g. 'hx1k', '25k', 'LIFCL-40-9BG400C' | |
| package | No | Package, e.g. 'tq144', 'CABGA256' (not needed for nexus/gowin) | |
| constraints | No | Optional pin constraints (PCF/LPF/PDC/CST text) | |
| timeout | No | PnR timeout in seconds | |
| backend | No | PnR backend | yosys |
| litex_board | No | LiteX board target (required if backend=litex) | |
| litex_args | No | Extra LiteX CLI args (backend=litex) |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It effectively describes key behaviors: the two-step synthesis and place-and-route process, backend-specific handling (e.g., LiteX ignoring Verilog inputs), timeout parameter, and the return values (max frequency, critical path, etc.). It also lists supported targets and common device/package values, adding useful operational context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is well-structured and front-loaded with the core purpose, followed by backend details, return values, and target-specific notes. It is appropriately sized for a complex tool with 10 parameters, though the device/package list is somewhat lengthy but necessary for clarity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (10 parameters, no annotations, no output schema), the description does a good job of covering the workflow, backend options, return values, and target specifics. It could be more complete by detailing error handling or output format specifics, but it provides sufficient context for effective use.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents all parameters thoroughly. The description adds some value by clarifying device/package examples and noting that package is 'not needed for nexus/gowin', but it does not significantly enhance parameter understanding beyond what the schema provides, meeting the baseline for high coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description explicitly states the tool's purpose: 'Synthesize Verilog with Yosys then place-and-route with nextpnr in one step.' It clearly distinguishes this from sibling tools like 'synthesize' (which only does synthesis) and 'litex_build' (which handles LiteX-specific flows), making the scope and differentiation evident.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool by mentioning the backend options ('yosys' vs 'litex') and noting that 'litex' ignores Verilog inputs. However, it does not explicitly state when to choose this over alternatives like 'synthesize' or 'litex_build', which would be needed for a perfect score.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Search GitHub for open-source MIT-licensed FPGA IP cores. Returns repo names, star counts, descriptions and topics. Use import_github_core to download a result into the local registry.
| Name | Required | Description | Default |
|---|---|---|---|
| query | Yes | Search terms, e.g. 'uart verilog' or 'riscv softcore' | |
| language | No | Filter by HDL language (optional) | |
| max_results | No | Maximum number of results to return |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It describes the search scope (GitHub, MIT-licensed), return format, and relationship to import_github_core. However, it doesn't mention rate limits, authentication requirements, error conditions, or pagination behavior, which are important for a search tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is perfectly concise with two sentences that each serve distinct purposes: the first defines the tool's function and output, the second provides usage guidance. There's zero wasted language or redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a search tool with no annotations and no output schema, the description provides adequate basic information about purpose and usage. However, it lacks details about the search algorithm, result ordering, error handling, or authentication requirements that would be helpful given the tool's complexity and the absence of structured behavioral annotations.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents all three parameters thoroughly. The description doesn't add any parameter-specific information beyond what's in the schema. The baseline score of 3 is appropriate when the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Search GitHub'), target resource ('open-source MIT-licensed FPGA IP cores'), and return format ('repo names, star counts, descriptions and topics'). It distinguishes from sibling tools by mentioning import_github_core as a complementary action rather than an alternative search method.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool (searching GitHub for FPGA IP cores) and mentions import_github_core as the next step for downloading results. However, it doesn't explicitly state when NOT to use it or compare it to potential alternatives like get_ip_core or list_ip_cores from the sibling list.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Compile and simulate Verilog using Icarus Verilog (iverilog + vvp). Provide the design source and a separate testbench. Returns all $display/$monitor output and any runtime errors.
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | Verilog design source | |
| testbench | Yes | Verilog testbench source | |
| timeout | No | Timeout in seconds |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses key behavioral traits: it compiles and simulates, uses specific tools (iverilog + vvp), returns output from $display/$monitor and runtime errors, and implies a timeout via the parameter. However, it lacks details on permissions, rate limits, or error handling beyond runtime errors.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is appropriately sized and front-loaded, with two sentences that efficiently convey purpose, inputs, and outputs without wasted words. Every sentence adds necessary information, making it highly concise and well-structured.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (simulation with compilation), no annotations, and no output schema, the description is adequate but has gaps. It covers the basic operation and outputs but lacks details on error types, output format, or prerequisites, which could be important for a simulation tool with multiple parameters.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents all parameters. The description adds marginal value by mentioning 'design source' and 'testbench' which align with 'code' and 'testbench' parameters, but does not provide additional syntax, format details, or usage examples beyond what the schema provides.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Compile and simulate Verilog') using specific tools ('Icarus Verilog (iverilog + vvp)'), distinguishes from siblings by focusing on simulation rather than formatting, linting, synthesis, or IP management, and explicitly mentions the required inputs ('design source and a separate testbench').
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool (for Verilog simulation with Icarus Verilog) and implies usage by specifying the required inputs, but does not explicitly state when not to use it or name alternatives among the sibling tools (e.g., 'synthesize' or 'lint_hdl' for other tasks).
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Synthesize Verilog HDL using Yosys or run LiteX backend. Returns resource statistics and the list of inferred modules. Supported targets: generic, ice40, ecp5, gowin, xilinx, intel.
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | Verilog source code | |
| top_module | Yes | Name of the top-level module | |
| target | No | FPGA family / synthesis target | generic |
| backend | No | Synthesis backend | yosys |
| litex_board | No | LiteX board target (required if backend=litex) | |
| litex_args | No | Extra LiteX CLI args (backend=litex) | |
| timeout | No | Timeout in seconds |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. It mentions the return values ('resource statistics and the list of inferred modules') which is helpful, but doesn't describe important behavioral aspects like whether this is a read-only analysis or a destructive synthesis operation, potential side effects, execution time implications, or error handling. For a complex synthesis tool with 7 parameters, this is insufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is appropriately concise with two sentences that efficiently convey the core functionality and supported targets. The first sentence states the main purpose, and the second provides important context about outputs and targets. No wasted words, though it could be slightly more structured.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a complex synthesis tool with 7 parameters, no annotations, and no output schema, the description is incomplete. While it mentions return values, it doesn't adequately describe the tool's behavior, side effects, or how it differs from similar tools in the context. The agent would need to infer too much about this potentially complex operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The schema description coverage is 100%, so all parameters are documented in the schema. The description doesn't add any parameter-specific information beyond what's in the schema. It mentions 'Supported targets' which aligns with the 'target' parameter enum, but provides no additional context about target differences or selection criteria. Baseline 3 is appropriate when schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: 'Synthesize Verilog HDL using Yosys or run LiteX backend.' It specifies the action (synthesize/run backend), resource (Verilog HDL), and tools involved (Yosys/LiteX). However, it doesn't explicitly differentiate from sibling tools like 'litex_build' or 'place_and_route' which might have overlapping functionality.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage context by mentioning 'Supported targets' and the backend options, but doesn't provide explicit guidance on when to choose this tool versus alternatives like 'litex_build' or 'place_and_route'. It mentions what the tool does but not when it's the appropriate choice among siblings.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
v0.1.0format_hdlgenerate_ipget_diagnosticsget_ip_coreimport_fusesoc_coreimport_github_corelint_hdllist_ip_coreslitex_buildlitex_flowlitex_socplace_and_routesearch_github_coressimulatesynthesizeScored across 15 tools
Most tools have distinct purposes, but there is some overlap between lint_hdl and get_diagnostics, both focusing on HDL linting with different tools, which could cause confusion. Other tools like generate_ip and get_ip_core are clearly differentiated, and the LiteX tools (litex_build, litex_flow, litex_soc) have overlapping functionality but are described with enough detail to distinguish them.
All tool names follow a consistent snake_case pattern with clear verb_noun structures, such as format_hdl, generate_ip, and list_ip_cores. There are no deviations in naming conventions, making the set predictable and easy to parse for an agent.
With 15 tools, the server is well-scoped for FPGA development tasks, covering code formatting, IP core management, linting, simulation, synthesis, and place-and-route. Each tool serves a specific purpose without redundancy, fitting the domain's complexity appropriately.
The tool set provides comprehensive coverage for FPGA workflows, including code preparation (format_hdl, lint_hdl), IP core handling (list_ip_cores, get_ip_core, generate_ip, import functions), simulation (simulate), synthesis (synthesize), and implementation (place_and_route). There are no obvious gaps, supporting end-to-end development from design to gateware.
Run, build, and validate firmware on virtual hardware from your AI agent. Hardware knowledge corpus.
A public board where AI agents design pieces of an open AI inference accelerator on sky130. Submit Verilog and it is linted, synthesised, simulated against hidden vectors, mapped to real standard cells for area, timed for critical path and power, and proven equivalent to a reference. No key, no account, one call. The best verified design gets fabricated.
AI-native git hosting — repos, PRs, issues, CI gates, and AI code review over MCP (60 tools).
Connect AI assistants to GitHub - manage repos, issues, PRs, and workflows through natural language.
