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arcgis-mcp-bridge

create_feature_class

Create an empty feature class in an existing file geodatabase with specified geometry type and spatial reference. Prepare a controlled dataset for loading, editing, or analysis.

Instructions

Create an empty feature class inside an existing file geodatabase using ArcPy CreateFeatureclass. Use this to prepare a controlled output dataset with a chosen geometry type and optional WKID before loading, editing, or analysis. Reads the target geodatabase path inside a PathGuard allowed root and returns the created dataset.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

Without annotations, the description carries the full burden. It mentions reading the geodatabase path under PathGuard allowed root and returning the created dataset. It omits details on overwrite behavior, error conditions, and permissions. The core action of creating an empty feature class is clear, but missing behavioral traits lower the score.

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?

Three sentences front-load the action and purpose. Every sentence adds value: the first defines the tool, the second gives usage context, the third specifies environment constraints and output. 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 the presence of an output schema, the description need not detail return values. It covers purpose, usage, environment constraints (PathGuard), and basic behavior. It could mention that the feature class is empty and note prerequisites, but it is largely complete.

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% per context, so the description must compensate. It only mentions 'geometry type' and 'optional WKID', leaving other parameters like name, out_gdb, and overwrite unexplained. This is insufficient for the five parameters.

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 clearly states the verb 'Create' and the resource 'empty feature class inside an existing file geodatabase', using ArcPy. It distinguishes from siblings like create_file_gdb and copy_features by specifying it creates a new empty dataset. However, it does not explicitly contrast with alternative tools, which prevents a 5.

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 provides a clear usage context: 'before loading, editing, or analysis'. It does not specify when not to use the tool or mention alternative tools, such as copy_features or create_file_gdb. This limits the guidance to positive cases only.

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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