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lcapossio

fpgaZeroMCP

by lcapossio

simulate

Compile and simulate HDL designs with Icarus Verilog or GHDL. Provide design code and testbench to get simulation output and runtime errors.

Instructions

Compile and simulate HDL using Icarus Verilog (iverilog + vvp) or GHDL (VHDL). Provide the design source and a separate testbench. Returns all $display/$monitor output (Verilog) or report output (VHDL) and any runtime errors.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
codeYesHDL design source
testbenchYesHDL testbench source
languageNoHDL language variantverilog
timeoutNoTimeout in seconds
Behavior3/5

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

With no annotations, the description carries full burden. It discloses that outputs include $display/$monitor output or report output and runtime errors, but does not mention side effects, statefulness, permissions, or error handling beyond runtime errors. Adequate but not comprehensive.

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 extremely concise at two sentences, front-loaded with the main action. Every sentence provides essential information without wasted words.

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 description covers the core functionality and output type, compensating for the missing output schema. However, it lacks details about simulation behavior under errors, simulator versions, or requirements for the testbench (e.g., must include main module). Mostly complete.

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% with descriptions for each parameter. The tool description adds minimal value by reiterating that the design and testbench are separate, which is already clear from the schema. No additional format, constraints, or usage tips are provided.

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 tool's purpose: compile and simulate HDL using specific simulators (Icarus Verilog, GHDL). It distinguishes from sibling tools like lint_hdl, synthesize, etc., which have different objectives. The verb 'simulate' and resource 'HDL' 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?

The description implies usage for running simulations but does not explicitly state when to use it versus alternatives (e.g., lint_hdl, synthesize). No exclusions or prerequisites are mentioned, leaving the agent to infer from context.

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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