fpgaZeroMCP

by lcapossio

Overview Schema Source Related Servers Discussions Admin

Python

Local

litex_soc

Generate a LiteX SoC configuration without gateware build. Returns logs and output directory.

Instructions

Generate LiteX SoC without building gateware. Returns logs and output directory.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "board": "<board>"
    },
    "name": "litex_soc"
  }
}

Input Schema

Name	Required	Description
`board`	Yes	LiteX board target
`args`	No	Extra LiteX CLI args
`output_dir`	No	Optional output directory
`timeout`	No	Timeout in seconds

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.3.0Jun 21, 2026

TDQS

A3.7/5.0

Behavior3/5

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.

Conciseness5/5

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.

Completeness3/5

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.

Parameters3/5

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.

Purpose5/5

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.

Usage Guidelines3/5

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.