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SantosSjba

Civil 3D MCP Server

by SantosSjba

civil3d_command

Execute any native Civil 3D or AutoCAD command string, such as CREATECORRIDOR or EXPORTLANDXML, for operations not easily accomplished via the C# API.

Instructions

Execute a native Civil 3D or AutoCAD command string (same as typing in the command line). Use for operations not easily done via C# API: CREATECORRIDOR, EXPORTLANDXML, etc. Prefer civil3d_execute/civil3d_query when the C# API is sufficient.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
commandYesCommand string to execute, e.g. 'REGEN', 'CREATECORRIDOR', 'AeccCreateSurfaceGridFromDem'
confirmedNoSet true to confirm destructive commands (ERASE, PURGE, etc.)
timeoutMsNoMax wait time in ms when waitForCompletion is true (default: 300000)
descriptionNoBrief description for logging
waitForCompletionNoWait until the command finishes (default: true)
Behavior3/5

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

No annotations provided, so description carries full burden. The command-line analogy hints at behavior but lacks detail on side effects, errors, or behavior for destructive commands beyond the schema's confirmed param.

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?

Two sentences: first defines purpose, second gives usage guidance. No 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?

Given no output schema and no annotations, the description is nearly complete. It explains when to use, provides examples, and mentions alternatives. Could mention default timeout but that's in schema.

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?

Schema covers 100% of parameters, so baseline is 3. The description adds value by giving example command strings and context, justifying a score of 4.

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 the tool executes a native command string, provides examples like CREATECORRIDOR, and distinguishes from siblings by recommending civil3d_execute/civil3d_query when API is sufficient.

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

Usage Guidelines5/5

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

Explicitly tells when to use (operations not easily done via C# API) and when to prefer alternatives, with specific command examples.

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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