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arcgis-mcp-bridge

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identity_features

Overlay input features with polygon or line attributes, preserving input geometry and writing a new output feature class.

Instructions

Overlay input features with identity features using ArcPy Identity. Use this to transfer polygon or line attributes onto another feature layer while preserving the input geometry where applicable. Reads both input datasets and writes a new output feature class inside PathGuard allowed roots.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed5 schema fields changedv1.0.1
    • addedInput schema / $defs / IdentityFeaturesInput / description
      Added value: +"Input contract for identity overlay analysis."
    • addedInput schema / $defs / IdentityFeaturesInput / properties / in_features / description
      Added value: +"Absolute path to the primary input feature class or layer. The path must be inside a configured PathGuard allowed root."
    • addedInput schema / $defs / IdentityFeaturesInput / properties / out_features / description
      Added value: +"Absolute output feature class path to create. The path must be inside a configured PathGuard allowed root; existing outputs require overwrite=true."
    • addedInput schema / $defs / IdentityFeaturesInput / properties / overlay_features / description
      Added value: +"Absolute path to the secondary overlay feature class or layer. The path must be inside a configured PathGuard allowed root."
    • addedInput schema / $defs / IdentityFeaturesInput / properties / overwrite / description
      Added value: +"Set true only when replacing an existing output feature class is intended."
  2. First observedv1.0.0

TDQS

A3.7/5.0
Behavior3/5

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

No annotations are provided, so the description must disclose behavioral traits. It notes that output is written inside PathGuard allowed roots and that input geometry is preserved where applicable, but lacks detail on overwrite behavior (though schema has overwrite param), permission requirements, or side effects like attribute field naming.

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 two sentences, front-loading the core purpose and a use case. No redundant information, every word serves a purpose.

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

Completeness3/5

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

The tool has an output schema (implied), so return values need not be explained. However, the description lacks usage guidelines and sufficient behavioral details for a tool with no annotations, making it less complete for an AI agent.

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

Parameters3/5

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

Schema description coverage is 100% as each parameter has a description. The description does not add parameter-specific meaning beyond the schema, so baseline 3 is appropriate.

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 performs an Identity overlay to transfer attributes from overlay features to input features while preserving input geometry. It uses specific verb 'overlay' and resource 'features', and distinguishes itself from other overlay tools like intersect or union.

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 mentions using it to transfer attributes onto another feature layer, but provides no guidance on when to avoid it or suggests alternatives such as intersect or spatial join. Usage context is implied but not explicit.

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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