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Vensim MCP

Vensim MCP

by Cybing521
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python

create_vensim_dss_script

Create a Vensim DSS .cmd batch script to automate model runs from the command line, providing an official path when PLE lacks batch support.

Instructions

Create a Vensim DSS .cmd batch script; PLE does not support this official path.

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": {
      "model_path": "<model_path>",
      "output_path": "<output_path>"
    },
    "name": "create_vensim_dss_script"
  }
}

Input Schema

NameRequiredDescriptionDefault
run_nameNocurrent
model_pathYes
output_pathYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description must carry the burden of behavioral disclosure. It states that the tool creates a script but does not mention side effects such as writing to output_path, whether existing files are overwritten, or whether Vensim DSS is invoked. The PLE compatibility note is helpful but does not reveal the actual behavior of the operation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise and front-loaded with the main action and resource. The PLE caveat is a useful additional clause that does not feel wasted. It could be slightly more informative, but there is no unnecessary verbosity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no annotations, no output schema, and no parameter descriptions, this one-sentence definition is not complete for an agent that needs to invoke the tool correctly. It does not explain what the generated script contains, what the required paths represent, or what happens when the script is created. Some context is provided by the PLE note, but significant operational information is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate, but it provides no parameter-specific explanations. The parameter names 'model_path', 'output_path', and 'run_name' are somewhat self-explanatory, and the description implies the script relates to a model, but it does not clarify how each parameter is used or what 'run_name' controls.

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 uses a specific verb and resource: 'Create a Vensim DSS .cmd batch script.' It clearly identifies the artifact type and distinguishes this tool from siblings that generate, inspect, or validate actual Vensim models. The PLE caveat adds useful context, though the description does not explicitly state what the batch script is intended to do beyond being a DSS script.

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 PLE caveat implies this tool is intended for Vensim DSS workflows and should not be used in PLE environments. However, it does not explicitly state when to choose this tool over alternatives or name fallback tools. The usage context is implied rather than fully spelled out.

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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