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jgs-magic-sysmlv1-mcp

create_control_flow

Connect two activity nodes in a SysML v1 activity by creating a ControlFlow edge to specify execution order.

Instructions

Create a ControlFlow edge between two ActivityNodes within an Activity.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
source_idYes
target_idYes
activity_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.1

TDQS

B3.1/5.0
Behavior2/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It only says 'Create' without mentioning side effects, validation requirements, or return behavior. An agent cannot anticipate failure modes or the result 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.

Conciseness5/5

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

The description is a single, front-loaded sentence with no extraneous words. It communicates the core action efficiently, though this conciseness sacrifices detail.

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?

For a creation tool with three required parameters and no annotations, the description is far too sparse. It omits parameter semantics, usage context, and any behavioral details, making it inadequate for an agent to call correctly without opening the schema.

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 coverage is 0%, and the description fails to explain the parameters. It mentions 'between two ActivityNodes' but doesn't map source_id/target_id to those nodes or clarify activity_id's role. The parameter names alone are insufficient for correct invocation.

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 verb 'Create', the resource 'ControlFlow edge', and the context 'between two ActivityNodes within an Activity'. This distinguishes it from siblings like create_object_flow or create_connector, making its purpose unambiguous.

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

Usage Guidelines2/5

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. The description implies activity diagram usage but offers no explicit conditions or exclusions, leaving the agent to infer selection criteria.

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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