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bewygs

CFAST MCP

by bewygs

add_wall_vent

Add a wall vent connecting two compartments in a CFAST fire model, specifying its position, size, and wall face.

Instructions

Add a wall vent (door, window or opening) between two compartments.

Wall vents connect compartments that physically overlap in elevation, or connect a compartment to the outside. Both compartments must already exist in the model; comp_b may be "OUTSIDE" to vent to the exterior. All specifications of the vent are made relative to the floor of the first compartment.

Parameters

model_id : str Id of the model to modify. id : str Unique name of the vent. comp_a : str First compartment id; the reference for all vent specifications. comp_b : str Second compartment id, or "OUTSIDE" for the exterior. bottom : float Position of the bottom of the opening relative to the floor of the first compartment. Default units: m. height : float Height of the opening relative to the bottom of the opening. Default units: m. width : float Width of the opening. Default units: m. face : str The wall on which the vent is positioned. Choices are FRONT, REAR, LEFT, RIGHT; Front and Rear faces are parallel to the X axis, Left and Right to the Y axis. offset : float, optional For visualization only, the horizontal distance between the near edge of the vent and the origin of the axis defined by the selected face. Default units: m, default value: 0 m.

Returns

str Confirmation, the updated model summary, and any warnings.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYes
faceYes
widthYes
bottomYes
comp_aYes
comp_bYes
heightYes
offsetNo
model_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations are provided, so the description bears full responsibility for behavioral disclosure. It describes the addition operation and explains that specifications are relative to the first compartment's floor, which is helpful. However, it lacks explicit statements about side effects (e.g., overwriting existing vents with the same id, validation of compartment overlap) or potential errors.

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 well-structured with a purpose sentence, usage note, parameter list, and return type. It is front-loaded with key information. However, the parameter descriptions are somewhat verbose, and some details (like 'Default units: m') could be integrated into the schema or shortened without losing clarity.

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 the tool has 9 parameters, no annotations, and a simple output schema (string), the description covers purpose, parameters, and return value adequately. It mentions the elevation overlap requirement and the 'OUTSIDE' option. Missing context includes potential error conditions, validation behavior, or interaction with other model elements, but overall it is sufficient for an experienced user.

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

Parameters5/5

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

The input schema has 0% description coverage (only titles). The description compensates fully by providing detailed explanations for each parameter, including units (m), defaults (offset=0 m), allowed values (face choices), and the special value 'OUTSIDE' for comp_b. This adds critical meaning beyond the schema.

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 adds a wall vent (door, window, or opening) between two compartments. It explicitly distinguishes the resource type from sibling tools like add_mechanical_vent and add_ceiling_floor_vent by focusing on physical openings that connect compartments overlapping in elevation.

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

Usage Guidelines4/5

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

The description specifies that both compartments must already exist and that comp_b can be 'OUTSIDE' for an exterior vent. It provides context for when to use (connecting overlapping compartments) but does not explicitly compare to alternative vent types or state when not to use this tool.

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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